Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 11, 2024 |
Jun. 30, 2024 |
May 28, 2024 |
May 23, 2024 |
Apr. 05, 2024 |
Mar. 26, 2024 |
Feb. 02, 2024 |
Dec. 14, 2023 |
Oct. 12, 2023 |
Oct. 12, 2023 |
Feb. 10, 2023 |
Feb. 25, 2021 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Jun. 30, 2024 |
Jun. 30, 2023 |
Dec. 31, 2023 |
|
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Reverse stock split, description | 1 for 200 reverse stock split | the Company announced that its board of directors had declared a 1-for-200 reverse stock split of the company’s common stock. The reverse stock split became effective on May 28, 2024 (the “Effective Date”) at 12:01 AM Eastern. The company’s common stock began trading on a split-adjusted basis on May 28, 2024, under the current trading symbol “SINT.” The reverse stock split was primarily intended to bring the Company into compliance with the minimum bid price requirements for maintaining its listing on the Nasdaq Capital Market. The new CUSIP number for the Company’s shares of common stock following the reverse split will be 829392 703. As a result of the reverse stock split, every 200 shares of the Company’s common stock issued and outstanding were automatically reclassified into one new share of common stock. Proportionate adjustments were made to the conversion and exercise prices and the number of shares underlying the Company’s outstanding warrants, preferred stock, equity awards and the number of shares reserved under the Company’s equity incentive plan. | |||||||||||||||||
| Net loss | $ 2,204 | $ 886 | $ 2,455 | $ 293 | $ 3,090 | $ 2,748 | |||||||||||||
| Cash in operating activities | 4,948 | 8,071 | |||||||||||||||||
| Accumulated deficit | $ 273,804 | $ 273,804 | $ 273,804 | $ 270,714 | |||||||||||||||
| Common stock shares issued | 748,341 | 748,341 | 748,341 | 26,603 | |||||||||||||||
| Gross proceeds common stock | $ 3,111 | $ 4,840 | |||||||||||||||||
| Stock issued in public offering | 358,000 | 142,000 | 80,000 | 10,750 | |||||||||||||||
| Sale of stock price | $ 4.20 | $ 9.40 | $ 50.00 | ||||||||||||||||
| Warrants exercise price | 55.00 | $ 1,120.00 | |||||||||||||||||
| Offering expenses payable | $ 1,500 | $ 1,300 | |||||||||||||||||
| State and local income tax percentage | 5.00% | ||||||||||||||||||
| Class E and Class F Warrants [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Warrants exercise price | $ 50.00 | ||||||||||||||||||
| Common Stock Warrants [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Aggregate offering price | $ 12,000 | ||||||||||||||||||
| Stock issued in public offering | 430 | ||||||||||||||||||
| Gross proceeds from sale of stock | $ 4,000 | $ 12,000 | |||||||||||||||||
| Common Stock and Prefunded Warrants [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Gross proceeds from sale of stock | 600 | 5,400 | |||||||||||||||||
| Offering costs | 500 | 4,800 | |||||||||||||||||
| Offering fees and expenses | 4,000 | ||||||||||||||||||
| Derivative Liabilities for Common Stock Warrants [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Gross proceeds from sale of stock | 3,400 | 6,700 | |||||||||||||||||
| Offering costs | 500 | 700 | |||||||||||||||||
| Agent Warrant Offering [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Offering costs | $ 100 | $ 100 | |||||||||||||||||
| Maxim Group LLC [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Aggregate offering price | $ 15,000 | ||||||||||||||||||
| 2021 Equity Distribution Agreement [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Available for sale | $ 3,100 | ||||||||||||||||||
| Common stock shares issued | 12,360 | 12,360 | 12,360 | ||||||||||||||||
| Gross proceeds common stock | $ 1,000 | ||||||||||||||||||
| Stock issued in public offering | 12,360 | ||||||||||||||||||
| 2021 Equity Distribution Agreement [Member] | Maxim Group LLC [Member] | |||||||||||||||||||
| Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] | |||||||||||||||||||
| Aggregate offering price | $ 15,000 | $ 15,000 | |||||||||||||||||
| Distribution amount | $ 3,100 | ||||||||||||||||||
| Available for sale | $ 70 | ||||||||||||||||||