Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.20.1
Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Board of Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expenses $ 209    
2012 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock reserved for issuance 529,260    
Stock options exercisable, description Stock options generally vest and become exercisable with respect to 100% of the common stock.    
2012 Equity Incentive Plan [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for issuance     850,000
2012 Equity Incentive Plan [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for issuance     1,200,000
Share-Based Compensation [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for issuance 172,727    
Stock-based compensation expenses $ 217 $ 243