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8. Stock-Based Compensation (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Share-based Payment Arrangement, Noncash Expense [Abstract]            
Options vested 2,400          
Stock compensation expense $ 196 $ 290 $ 317 $ 264 $ 486 $ 581
Options granted 399   423      
Unrecognized compensation expense $ 1,000       $ 1,000  
Unrecognized compensation expense, recognition period         2 years 1 month 6 days