Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Noncontrolling Interest [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Foreign Currency Adjustment Attributable to Parent [Member]	Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]	Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2018										37,446,323
Balance at Dec. 31, 2018										$ 374	$ 267,317	$ (31,127)	$ (3,989)	$ (15)	$ (1,543)	$ 231,017	$ 45,356	$ 276,373
Issuance of common stock (in shares)										1,036,702
Issuance of common stock										$ 11	6,552	0	0	0	0	6,563	0	6,563
Warrant expenses										0	730	0	0	0	0	730	0	730
Net income (loss)										0	0	(9,727)	0	0	0	(9,727)	1,007	(8,720)
Other Comprehensive Income (Loss), Net of Tax, Total										0	0	0	(1,299)	50	(25)	(1,274)	(45)	(1,319)
Share-based compensation expenses										$ 0	1,151	0	0	0	0	1,151	0	1,151
Balance (in shares) at Sep. 30, 2019										38,483,025
Balance at Sep. 30, 2019										$ 385	275,750	(40,854)	(5,288)	35	(1,568)	228,460	46,318	274,778
Balance (in shares) at Jun. 30, 2019										38,452,111
Balance at Jun. 30, 2019										$ 384	275,284	(38,067)	(3,389)	333	(1,578)	232,967	46,912	279,879
Issuance of common stock (in shares)										30,914
Issuance of common stock										$ 1	96	0	0	0	0	97	0	97
Warrant expenses										0	0	0	0	0	0	0	0	0
Net income (loss)										0	0	(2,787)	0	0	0	(2,787)	(575)	(3,362)
Other Comprehensive Income (Loss), Net of Tax, Total										0	0	0	(1,899)	(298)	10	(2,187)	(19)	(2,206)
Share-based compensation expenses										$ 0	370	0	0	0	0	370	0	370
Balance (in shares) at Sep. 30, 2019										38,483,025
Balance at Sep. 30, 2019										$ 385	275,750	(40,854)	(5,288)	35	(1,568)	228,460	46,318	$ 274,778
Balance (in shares) at Dec. 31, 2019										38,525,636								38,525,636
Balance at Dec. 31, 2019	$ 0	$ 413	$ (413)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 385	276,827	(46,145)	(4,568)	475	(1,929)	225,045	46,739	$ 271,784
Issuance of common stock (in shares)										1,762,817
Issuance of common stock										$ 18	8,361	0	0	0	0	8,379	0	8,379
Warrant expenses										0	1,173	0	0	0	0	1,173	0	1,173
Net income (loss)										0	0	(31,407)	0	0	0	(31,407)	1,990	(29,417)
Other Comprehensive Income (Loss), Net of Tax, Total										0	0	0	(2,729)	(577)	(645)	(3,951)	(1,211)	(5,162)
Share-based compensation expenses										$ 0	447	0	0	0	0	447	0	$ 447
Balance (in shares) at Sep. 30, 2020										40,288,453								40,288,453
Balance at Sep. 30, 2020										$ 403	287,221	(77,965)	(7,297)	(102)	(2,574)	199,686	47,518	$ 247,204
Balance (in shares) at Jun. 30, 2020										40,210,299
Balance at Jun. 30, 2020										$ 401	286,205	(78,332)	(8,233)	(205)	(2,935)	196,901	45,720	242,621
Issuance of common stock (in shares)										78,154
Issuance of common stock										$ 2	368	0	0	0	0	370	0	370
Share-based compensation expenses										0	238	0	0	0	0	238	0	238
Warrant expenses										0	410	0	0	0	0	410	0	410
Net income (loss)										0	0	367	0	0	0	367	1,385	1,752
Other Comprehensive Income (Loss), Net of Tax, Total										$ 0	0	0	936	103	361	1,400	413	$ 1,813
Balance (in shares) at Sep. 30, 2020										40,288,453								40,288,453
Balance at Sep. 30, 2020										$ 403	$ 287,221	$ (77,965)	$ (7,297)	$ (102)	$ (2,574)	$ 199,686	$ 47,518	$ 247,204