Net Income (Loss) per Share of Common Stock (Net Income Per Share Computation) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 1,765	$ (5,353)	$ 340	$ (2,669)	$ (2,569)	$ (2,105)	$ (3,248)	$ (7,343)
Accretion of preferred stock to current redemption value	0			(766)			(651)	(2,274)
Net income (loss) attributable to common shareholders	$ 1,765			$ (3,435)			$ (3,899)	$ (9,617)
Weighted-average shares outstanding - Basic (in shares)	8,293,312			1,343,483			6,267,576	1,344,755
Add: dilutive effect stock options and restricted stock units (in shares)	193,492			0			0	0
Weighted-average shares outstanding - Diluted (in shares)	8,486,804			1,343,483			6,267,576	1,344,755
Net income (loss) per share - Basic (in dollars per share)	$ 0.21			$ (2.56)			$ (0.62)	$ (7.15)
Net income (loss) per share - Diluted (in dollars per share)	$ 0.21			$ (2.56)			$ (0.62)	$ (7.15)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	394,672			291,754			1,102,784	291,754
Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	394,672			291,754			1,029,030	291,754
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	0			0			73,754	0