Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Feb. 10, 2023 |
Jan. 10, 2023 |
Dec. 20, 2022 |
Oct. 17, 2022 |
Nov. 24, 2021 |
Feb. 25, 2021 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Jan. 06, 2023 |
|
| Product Information [Line Items] | |||||||||||
| Reverse stock split, description | 1 for 100 reverse stock split | ||||||||||
| Net loss | $ 12,039,000 | $ 9,309,000 | |||||||||
| Net cash used in operations | 10,263,000 | 10,127,000 | |||||||||
| Retained earnings (accumulated deficit) | 262,455,000 | 250,416,000 | |||||||||
| Stock issued in public offering, units | 4,656 | ||||||||||
| Proceeds from public offering | $ 4,700,000 | ||||||||||
| Other income | $ 500,000 | 500,000 | |||||||||
| Reduction of stockholders equity | 500,000 | ||||||||||
| Increase in loss | $ 500,000 | ||||||||||
| Accounts Payable | $ 200,000 | ||||||||||
| Leasehold improvements useful lives | Leasehold improvements are amortized over the shorter of their estimated useful lives or the related lease term, generally five years | ||||||||||
| Impairment loss for definite-lived intangible assets | $ 0 | ||||||||||
| Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Commercial Customer and Government Agencies [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Concentration risk percentage | 79.00% | ||||||||||
| Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Commercial Customer and Government Agencies [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Concentration risk percentage | 66.00% | ||||||||||
| Subsequent Event [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Stock issued in public offering, units | 2,150,000 | ||||||||||
| Sale of stock, description of transaction | the Company closed on a public offering of 2,150,000 units, with each unit consisting of one share of common stock, or one pre-funded warrant to purchase one share of its common stock, one Class C Warrant with each warrant to purchase one share of common stock, and one half of one Class D Warrant with each whole warrant to purchase one share of common stock | ||||||||||
| Sale of stock price | $ 5.60 | $ 1.00 | |||||||||
| Net proceeds from sale of stock | $ 15,000,000.0 | ||||||||||
| Subsequent Event [Member] | Common Stock Warrants [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Stock issued in public offering, units | 86,000 | ||||||||||
| Gross proceeds from sale of stock | $ 12,000,000.0 | ||||||||||
| Net proceeds from sale of stock | $ 10,900,000 | ||||||||||
| Maximum [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Property and equipment, estimated useful lives | 5 years | ||||||||||
| Minimum [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Property and equipment, estimated useful lives | 3 years | ||||||||||
| Maxim Group LLC [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Sale of stock, description of transaction | Under the terms of the 2021 Distribution Agreement, Maxim will be entitled to a transaction fee at a fixed rate of 2.0% of the gross sales price of Shares sold under the 2021 Distribution Agreement | ||||||||||
| Gross proceeds from sale of stock | $ 15,000,000.0 | ||||||||||
| 2019 ATM Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Stock offering expense | $ 34,000.000 | ||||||||||
| Stock issued in public offering, units | 3,544 | ||||||||||
| Number of shares sold, value | $ 800,000 | ||||||||||
| 2019 ATM Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | Maximum [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Stock offering expense | $ 2,500,000 | ||||||||||
| 2021 ATM Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Sale of stock, description of transaction | The Offering will terminate upon the earlier of (i) the sale of shares having an aggregate offering price of $2.0 million, (ii) the termination by either Maxim or the Company upon the provision of fifteen (15) days written notice, or (iii) February 25, 2024. Under the terms of the 2021 Distribution Agreement, Maxim will be entitled to a transaction fee at a fixed rate of 2.0% of the gross sales price of Shares sold under the 2021 Distribution Agreement. The Company will also reimburse Maxim for certain expenses incurred in connection with the 2021 Distribution Agreement and agreed to provide indemnification and contribution to Maxim with respect to certain liabilities under the Securities Act and the Securities Exchange Act of 1934, as amended. As of December 30, 2022, there have been no sales of shares of common stock under the 2021 Distribution Agreement | ||||||||||
| 2021 ATM Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | Maximum [Member] | |||||||||||
| Product Information [Line Items] | |||||||||||
| Stock offering expense | $ 2,000,000.0 | ||||||||||