CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	(Accumulated Deficit) / Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2018	$ 372	$ 132,831	$ (54,758)	$ (15,466)	$ (3,518)	$ 59,461
Balance (in shares) at Dec. 31, 2018	37,161		(5,514)
Net loss attributable to common stockholders	$ 0	0	$ 0	(2,213)	0	(2,213)
Settlement of stock awards	$ 3	0	$ (566)	0	0	(563)
Settlement of stock awards (in shares)	329		(134)
Unrealized gain (loss) on pension liability	$ 0	0	$ 0	1,649	(1,533)	116
Stock-based compensation expense	0	332	0	0	0	332
Balance at Mar. 31, 2019	$ 375	133,163	$ (55,324)	(16,030)	(5,051)	57,133
Balance (in shares) at Mar. 31, 2019	37,490		(5,648)
Balance at Dec. 31, 2018	$ 372	132,831	$ (54,758)	(15,466)	(3,518)	59,461
Balance (in shares) at Dec. 31, 2018	37,161		(5,514)
Net loss attributable to common stockholders						(7,266)
Balance at Sep. 30, 2019	$ 376	133,867	$ (55,527)	(21,083)	(4,820)	52,813
Balance (in shares) at Sep. 30, 2019	37,603		(5,699)
Balance at Dec. 31, 2018	$ 372	132,831	$ (54,758)	(15,466)	(3,518)	59,461
Balance (in shares) at Dec. 31, 2018	37,161		(5,514)
Stock-based consulting fees						1,800
Balance at Dec. 31, 2019	$ 376	134,217	$ (55,731)	(15,997)	(3,174)	59,691
Balance (in shares) at Dec. 31, 2019	37,612		(5,731)
Balance at Mar. 31, 2019	$ 375	133,163	$ (55,324)	(16,030)	(5,051)	57,133
Balance (in shares) at Mar. 31, 2019	37,490		(5,648)
Net loss attributable to common stockholders	$ 0	0	$ 0	(2,408)	0	(2,408)
Settlement of stock awards	$ 1	0	$ (203)	0	0	(202)
Settlement of stock awards (in shares)	109		(51)
Unrealized gain (loss) on pension liability	$ 0	0	$ 0	0	115	115
Stock-based compensation expense	0	351	0	0	0	351
Balance at Jun. 30, 2019	$ 376	133,514	$ (55,527)	(18,438)	(4,936)	54,989
Balance (in shares) at Jun. 30, 2019	37,599		(5,699)
Net loss attributable to common stockholders	$ 0	0	$ 0	(2,645)	0	(2,645)
Settlement of stock awards	$ 0	0	0	0	0	0
Settlement of stock awards (in shares)	4
Unrealized gain (loss) on pension liability	$ 0	0	0	0	116	116
Stock-based compensation expense	0	353	0	0	0	353
Balance at Sep. 30, 2019	$ 376	133,867	$ (55,527)	(21,083)	(4,820)	52,813
Balance (in shares) at Sep. 30, 2019	37,603		(5,699)
Balance at Dec. 31, 2019	$ 376	134,217	$ (55,731)	(15,997)	(3,174)	59,691
Balance (in shares) at Dec. 31, 2019	37,612		(5,731)
Net loss attributable to common stockholders	$ 0	0	$ 0	(3,253)	0	(3,253)
Settlement of stock awards	$ 4	0	$ (648)	0	0	(644)
Settlement of stock awards (in shares)	438		(197)
Unrealized gain (loss) on pension liability	$ 0	0	$ 0	0	112	112
Stock-based compensation expense	0	280	0	0	0	280
Stock-based consulting fees	$ 2	598	0	0	0	600
Stock-based consulting fees (in shares)	190
Stock buy-back	$ 0	0	$ (134)	0	0	(134)
Stock buy-back shares	0		(74)
Balance at Mar. 31, 2020	$ 382	135,095	$ (56,513)	(19,250)	(3,062)	56,652
Balance (in shares) at Mar. 31, 2020	38,240		(6,002)
Balance at Dec. 31, 2019	$ 376	134,217	$ (55,731)	(15,997)	(3,174)	59,691
Balance (in shares) at Dec. 31, 2019	37,612		(5,731)
Net loss attributable to common stockholders						11,890
Stock-based consulting fees						465,000,000
Balance at Sep. 30, 2020	$ 383	135,684	$ (56,791)	(4,107)	(2,837)	72,332
Balance (in shares) at Sep. 30, 2020	38,326		(6,173)
Balance at Mar. 31, 2020	$ 382	135,095	$ (56,513)	(19,250)	(3,062)	56,652
Balance (in shares) at Mar. 31, 2020	38,240		(6,002)
Net loss attributable to common stockholders	$ 0	0	$ 0	20,535	0	20,535
Settlement of stock awards	$ 1	0	$ (52)	0	0	(51)
Settlement of stock awards (in shares)	66		(26)
Unrealized gain (loss) on pension liability	$ 0	0	$ 0	0	113	113
Stock-based compensation expense	0	294	0	0	0	294
Stock buy-back	$ 0	0	$ (213)	0	0	(213)
Stock buy-back shares	0		(136)
Balance at Jun. 30, 2020	$ 383	135,389	$ (56,778)	1,285	(2,949)	77,330
Balance (in shares) at Jun. 30, 2020	38,306		(6,164)
Net loss attributable to common stockholders	$ 0	0	$ 0	(5,392)	0	(5,392)
Settlement of stock awards	$ 0	0	0	0	0	0
Settlement of stock awards (in shares)	20
Unrealized gain (loss) on pension liability	$ 0	0	0	0	112	112
Stock-based compensation expense	0	295	0	0	0	295
Stock buy-back	$ 0	0	$ (13)	0	0	(13)
Stock buy-back shares	0		(9)
Balance at Sep. 30, 2020	$ 383	$ 135,684	$ (56,791)	$ (4,107)	$ (2,837)	$ 72,332
Balance (in shares) at Sep. 30, 2020	38,326		(6,173)