Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018	$ 426	$ 115,719	$ (46,932)	$ 69,213
Balance (in shares) at Dec. 31, 2018	42,602,431
Issuance of common stock upon exercise of stock options		9		9
Issuance of common stock upon exercise of stock options (in shares)	10,000
Stock compensation expense		628		628
Net loss			(17,836)	(17,836)
Balance at Jun. 30, 2019	$ 426	116,356	(64,768)	52,014
Balance (in shares) at Jun. 30, 2019	42,612,431
Balance at Dec. 31, 2018	$ 426	115,719	(46,932)	$ 69,213
Balance (in shares) at Dec. 31, 2018	42,602,431
Issuance of common stock upon exercise of stock options (in shares)				10,000
Balance at Dec. 31, 2019	$ 426	117,557	(72,872)	$ 45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Balance at Mar. 31, 2019	$ 426	116,096	(50,971)	65,551
Balance (in shares) at Mar. 31, 2019	42,602,431
Issuance of common stock upon exercise of stock options		9		9
Issuance of common stock upon exercise of stock options (in shares)	10,000
Stock compensation expense		251		251
Net loss			(13,797)	(13,797)
Balance at Jun. 30, 2019	$ 426	116,356	(64,768)	52,014
Balance (in shares) at Jun. 30, 2019	42,612,431
Balance at Dec. 31, 2019	$ 426	117,557	(72,872)	45,111
Balance (in shares) at Dec. 31, 2019	42,628,560
Stock compensation expense	$ 0	333	0	333
Stock compensation expense (in shares)	0
Net loss			(499)	(499)
Balance at Jun. 30, 2020	$ 426	117,890	(73,371)	44,945
Balance (in shares) at Jun. 30, 2020	42,628,560
Balance at Mar. 31, 2020	$ 426	117,682	(75,757)	42,351
Balance (in shares) at Mar. 31, 2020	42,628,560
Stock compensation expense		208		208
Net loss			2,386	2,386
Balance at Jun. 30, 2020	$ 426	$ 117,890	$ (73,371)	$ 44,945
Balance (in shares) at Jun. 30, 2020	42,628,560