Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts on trade accounts receivable	$ 111	$ 111
Property and equipment, accumulated depreciation and amortization	6,854	6,778
Intangible assets, accumulated amortization	$ 8,552	$ 8,494
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	25,143,432	23,693,735
Common stock, shares outstanding	24,957,601	23,508,575
Treasury stock, shares	185,831	185,831