UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for Doubtful Accounts Receivable, Current	$ 630	$ 629
Preferred stock, par value (USD per share)	$ 0.001	$ 0.001
Preferred stock, Series A
Preferred stock, authorized	200,000	200,000
Series B Preferred Stock
Preferred stock, authorized	8,100,000	8,100,000
Preferred stock, shares issued	8,065,000	8,065,000
Preferred stock, shares outstanding	8,065,000	8,065,000
Preferred stock, Undesignated series
Preferred stock, authorized	51,700,000	51,700,000
Common Stock [Member]
Common stock, par value (USD per share)	$ 0.001	$ 0.001
Common stock, authorized	250,000,000	250,000,000
Common stock, issued	38,653,000	38,424,000
Common stock, outstanding	38,653,000	38,424,000