(7) Shareholders’ Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 2.65	$ 1.33	$ 1.11
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum	79.00%	72.00%	37.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum	71.00%	80.00%	39.00%
Stock-based compensation expense	$ 2,000	$ 1,900	$ 2,100
Unrecognized stock-based compensation costs	$ 4,900
Weighted-average period for unrecognized costs	2 years 3 months 18 days
Intrinsic value options outstanding	$ 13,100	11,900
Intrinsic value of options exercisable	9,700	8,200
Intrinsic value of options exercised	9,000	$ 1,000
Proceeds from options exercised	$ 6,000
Authorizations prior to December 31, 2015 [Member]
Class of Stock [Line Items]
Options authorized under plan	22,200,000
Shares available for grant	3,881,000
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 13,680
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 7,200
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchased During Period, Shares	3,884,876	351,926
Treasury Stock Acquired, Average Cost Per Share	$ 6.61	$ 3.97