Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock Outstanding [Member]		Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	[1]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	[1]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	[1]	Cumulative Effect, Period of Adoption, Adjustment [Member]	[1]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Common Stock Outstanding [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjusted Balance [Member]	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018											28,552,886					28,552,886
Balance at Dec. 31, 2018		[1]			$ 2,888				$ 2,888		$ 29	$ 169,898	$ (121,105)	$ (4,396)	$ 44,426	$ 29	$ 169,898		$ (123,993)	$ (4,396)	$ 41,538
Common stock issued for royalty payments (in shares)																29,067
Common stock issued for royalty payments																	40				40
Net loss																			(3,003)		(3,003)
Other comprehensive income (loss)																				92	92
Balance (in shares) at Mar. 31, 2019																28,581,953
Balance at Mar. 31, 2019																$ 29	169,938		(124,108)	(4,304)	41,555
Balance (in shares) at Dec. 31, 2018											28,552,886					28,552,886
Balance at Dec. 31, 2018		[1]			$ 2,888				$ 2,888		$ 29	$ 169,898	$ (121,105)	$ (4,396)	$ 44,426	$ 29	169,898		(123,993)	(4,396)	41,538
Net loss																					(5,268)
Other comprehensive income (loss)																					169
Balance (in shares) at Jun. 30, 2019																28,632,302
Balance at Jun. 30, 2019																$ 29	170,006		(126,373)	(4,227)	39,435
Balance (in shares) at Mar. 31, 2019																28,581,953
Balance at Mar. 31, 2019																$ 29	169,938		(124,108)	(4,304)	41,555
Common stock issued for royalty payments (in shares)																50,349
Common stock issued for royalty payments																	68				68
Net loss																			(2,265)		(2,265)
Other comprehensive income (loss)																				77	77
Balance (in shares) at Jun. 30, 2019																28,632,302
Balance at Jun. 30, 2019																$ 29	170,006		(126,373)	(4,227)	39,435
Balance (in shares) at Dec. 31, 2019																28,736,436		(353,063)
Balance at Dec. 31, 2019																$ 29	170,106	$ (413)	(122,234)	(4,371)	43,117
Common stock issued for royalty payments (in shares)																37,312
Common stock issued for royalty payments																	9				9
Net loss																			(7,381)		(7,381)
Other comprehensive income (loss)																				415	415
Balance (in shares) at Mar. 31, 2020																28,773,748		(353,063)
Balance at Mar. 31, 2020																$ 29	170,115	$ (413)	(129,615)	(3,956)	36,160
Balance (in shares) at Dec. 31, 2019																28,736,436		(353,063)
Balance at Dec. 31, 2019																$ 29	170,106	$ (413)	(122,234)	(4,371)	43,117
Net loss																					(16,706)
Other comprehensive income (loss)																					371
Balance (in shares) at Jun. 30, 2020																30,773,748		(353,063)
Balance at Jun. 30, 2020																$ 31	171,341	$ (413)	(138,940)	(4,000)	28,019
Balance (in shares) at Mar. 31, 2020																28,773,748		(353,063)
Balance at Mar. 31, 2020																$ 29	170,115	$ (413)	(129,615)	(3,956)	36,160
Common stock issued for royalty payments (in shares)
Common stock issued for royalty payments																	4				4
Net loss																			(9,325)		(9,325)
Other comprehensive income (loss)																				(44)	(44)
Common stock issued as partial payment of Reach Construction Group, Inc. (in shares)																2,000,000
Common stock issued as partial payment of Reach Construction Group, Inc.																$ 2	1,222				1,224
Balance (in shares) at Jun. 30, 2020																30,773,748		(353,063)
Balance at Jun. 30, 2020																$ 31	$ 171,341	$ (413)	$ (138,940)	$ (4,000)	$ 28,019

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