Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands		Previously Reported [Member] Common Stock [Member]	Previously Reported [Member] Additional Paid-in Capital [Member]	Previously Reported [Member] Retained Earnings [Member]	Previously Reported [Member] AOCI Attributable to Parent [Member]	Previously Reported [Member]	Restatement Adjustment [Member] Common Stock [Member]	Restatement Adjustment [Member] Additional Paid-in Capital [Member]	Restatement Adjustment [Member] Retained Earnings [Member]	Restatement Adjustment [Member] AOCI Attributable to Parent [Member]	Restatement Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares)												20,806,219
Balance (in shares) at Dec. 31, 2015												20,806,219
Balance at Dec. 31, 2015												$ 21	$ 149,639	$ (88,704)	$ (1,440)	$ 59,516
Options granted for services and compensation													227			227
Common stock issued for exercises of options (in shares)												718
Common stock issued for exercises of options
Common stock issued for compensation, royalties, and services payments (in shares)												109,911
Common stock issued for compensation, royalties, and services payments													308			308
Net loss														(7,266)		(7,266)
Other comprehensive loss															(4,150)	(4,150)
Balance (in shares)												20,806,219
Balance (in shares) at Dec. 31, 2016												20,916,848
Balance at Dec. 31, 2016												$ 21	150,174	(95,970)	(5,590)	48,635
Balance (in shares)												20,916,848
Common stock issued for exercises of options (in shares)												245
Common stock issued for exercises of options
Common stock issued for compensation, royalties, and services payments (in shares)												96,907
Common stock issued for compensation, royalties, and services payments													455			455
Net loss														(12,589)		(12,589)
Other comprehensive loss															2,080	2,080
Balance (in shares) | Accounting Standards Update 2014-09 [Member]		28,406,856
Balance (in shares)												20,916,848
Issuance of common stock, net (in shares)												7,392,856
Issuance of common stock, net												$ 7	18,898			18,905
Balance (in shares) (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017		28,406,856
Balance (in shares) at Dec. 31, 2017												28,406,856
Balance (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017		$ 28	$ 169,527	$ (108,559)	$ (3,510)	$ 57,486										1,891
Balance at Dec. 31, 2017												$ 28	169,527	(106,668)	(3,510)	59,377
Balance (in shares) | Accounting Standards Update 2014-09 [Member]		28,406,856
Balance (in shares)												28,406,856
Common stock issued for compensation, royalties, and services payments (in shares)												146,030
Net loss														(17,325)		(17,325)
Other comprehensive loss															(886)	(886)
Balance (in shares) | Accounting Standards Update 2014-09 [Member]		28,406,856
Balance (in shares)												28,406,856
Cumulative effect of accounting change (Accounting Standards Update 2014-09 [Member]) at Dec. 31, 2017	[1]								$ 1,891		$ 1,891
Common stock issued for compensation, services, and royalty payments												$ 1	371			372
Balance (in shares) at Dec. 31, 2018												28,552,886
Balance at Dec. 31, 2018												$ 29	$ 169,898	$ (123,993)	$ (4,396)	$ 41,538
Balance (in shares)												28,552,886

[1] Represents adjustment to accumulated deficit upon the adoption of Accounting Standards Codification Topic 606.