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6. Income Taxes (Details) - Schedule of Effective Income Tax Rate Reconciliation - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Schedule of Effective Income Tax Rate Reconciliation [Abstract]        
Income tax expense at federal statutory rate $ 487 $ 652 $ 687 $ 1,082
Increase (decrease) in taxes resulting from:        
Domestic production activities deduction (38) (17) (58) (47)
Research and development credit (32) 0 (63) 0
Incentive stock options 19 0 35 0
State taxes, net of federal benefit 28 22 30 38
Increase in reserve for uncertain tax positions 4 (51) 10 (51)
Other 11 (12) 20 21
Income tax expense per the statement of operations $ 479 $ 594 $ 661 $ 1,043