Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 425	$ 487
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ .001
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	12,132,291	12,123,520
Common stock, shares outstanding	12,124,649	12,115,878
Treasury stock, shares	7,642	7,642

Amount of allowance for credit loss on accounts receivable, classified as current.

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