CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive (Loss) Income	Total
Balance at beginning of period at Dec. 31, 2016	$ 228	$ 151,185	$ 21,657	$ (1,596)	$ 171,474
Balance at beginning of period (in shares) at Dec. 31, 2016	22,795,039
Increase (Decrease) in Stockholders' Equity
Net loss			(31,790)		(31,790)
Unrealized income (loss) on foreign exchange rate translation				1,091
Income tax expense (benefit)				(275)
Other comprehensive income (loss)				816	816
Issuance of common stock under stock compensation plans	$ 1	(1)
Issuance of common stock under stock compensation plans (in shares)	92,448
Stock-based compensation expense		656			656
Issuance of common stock as compensation		320			320
Issuance of common stock as compensation (in shares)	67,498
Shares exchanged for taxes on stock-based compensation		(158)			(158)
Shares exchanged for taxes on stock-based compensation (in shares)	(28,180)
Balance at end of period at Dec. 31, 2017	$ 229	152,022	(10,153)	(780)	141,318
Balance at end of period (in shares) at Dec. 31, 2017	22,926,805
Increase (Decrease) in Stockholders' Equity
Impact of adopting ASUs		20	(20)
Cash in lieu of fractional shares for stock dividend			(1)		(1)
Cash in lieu of fractional shares for stock dividend (in shares)	(101)
Net loss			(24,407)		(24,407)
Unrealized income (loss) on foreign exchange rate translation				(1,141)
Other comprehensive income (loss)				(1,141)	(1,141)
Issuance of common stock under stock compensation plans	$ 1	(1)
Issuance of common stock under stock compensation plans (in shares)	51,384
Stock-based compensation expense		1,037			1,037
Issuance of common stock as compensation		331			331
Issuance of common stock as compensation (in shares)	59,284
Shares exchanged for taxes on stock-based compensation		(121)			(121)
Shares exchanged for taxes on stock-based compensation (in shares)	(18,931)
Balance at end of period at Dec. 31, 2018	$ 230	153,268	(34,518)	(1,964)	$ 117,016
Balance at end of period (in shares) at Dec. 31, 2018	23,018,441				22,969,996
Increase (Decrease) in Stockholders' Equity
Impact of adopting ASUs			43	(43)
Net loss			(15,213)		$ (15,213)
Unrealized income (loss) on foreign exchange rate translation				504
Income tax expense (benefit)				(112)
Other comprehensive income (loss)				392	392
Issuance of common stock under stock compensation plans	$ 2	(2)
Issuance of common stock under stock compensation plans (in shares)	263,459
Stock-based compensation expense		909			909
Issuance of common stock as compensation	$ 1	296			297
Issuance of common stock as compensation (in shares)	119,556
Shares exchanged for taxes on stock-based compensation		(236)			(236)
Shares exchanged for taxes on stock-based compensation (in shares)	(65,601)
Balance at end of period at Dec. 31, 2019	$ 233	$ 154,235	$ (49,731)	$ (1,572)	$ 103,165
Balance at end of period (in shares) at Dec. 31, 2019	23,335,855				23,287,410