Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies (Details Narrative)

v3.21.2
Organization and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 25, 2021
Feb. 06, 2020
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Aug. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]                          
Net income (loss) attributable to parent     $ 2,343 $ 2,199 $ 2,633 $ 2,438   $ 4,028 $ (1,169) $ 7,175 $ 5,297    
Net cash provided by (used in) operating activities                   7,747 $ 7,056    
Retained earnings (accumulated deficit)     $ 248,282             $ 248,282   $ 241,107  
Proceeds from Issuance Initial Public Offering   $ 9,400                      
[custom:UnderwritingDiscountsAndCommissionsAndOfferingExpenses]   $ 1,200                      
Four Registered Direct Offering [Member]                          
Property, Plant and Equipment [Line Items]                          
[custom:StockIssuedDuringPeriodSharesIssuanceCost]             11,015,000            
Proceeds from Debt, Net of Issuance Costs             $ 20,900            
Payments of Stock Issuance Costs             $ 1,600            
ATM Equity Distribution Agreement [Member]                          
Property, Plant and Equipment [Line Items]                          
Payments of Stock Issuance Costs                       $ 34  
Sale of Stock, Number of Shares Issued in Transaction                       354,381  
Sale of Stock, Consideration Received Per Transaction                       $ 800  
ATM Equity Distribution Agreement [Member] | Maximum [Member]                          
Property, Plant and Equipment [Line Items]                          
Proceeds from Issuance Initial Public Offering                         $ 2,500
Equity Distribution Agreement [Member] | Maxim Group LLC [Member]                          
Property, Plant and Equipment [Line Items]                          
Aggregate offering price $ 15,000