Consolidated Balance Sheets Parentheticals - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Consolidated Balance Sheets [Abstract]
Accumulated depreciation and amortization, property and equipment	$ 5,070	$ 4,853
Preferred stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	150,114	150,082
Treasury stock, shares	488	1,165