Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	29,750,000	29,750,000
Common stock, shares issued	13,780,823	13,553,409
Common stock, shares outstanding	13,780,823	13,553,409
Deferred revenue	$ 12,918	$ 10,140
Contract assets	$ 467	$ 1,089