Restatement of Previously Issued Financial Statements - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Operating activities
Net income (loss) from continuing operations	$ (2,010)	$ 553	$ 4,701	$ 1,789
Adjustments to reconcile net income (loss) from continuing operations to net cash used for operating activities:
Depreciation and amortization			2,469	2,813
Deferred income taxes			342	3,018
Stock compensation expense			3,722	2,430
Other			(113)	98
Net changes in operating assets and liabilities:
Affiliate payable			0	(2,196)
Trade receivables			7,567	(6,097)
Inventory			(95,684)	(38,662)
Other assets			(2,749)	(1,150)
Accounts payable			76,035	21,430
Other liabilities			(2,021)	(7,613)
Net cash provided by (used for) operating activities from continuing operations			(5,731)	(24,140)
Investing activities
Expenditures for property, plant and equipment			(2,596)	(3,156)
Other			(500)	0
Net cash provided by (used for) investing activities from continuing operations			(3,096)	(3,156)
Financing activities
Net additions to revolving credit agreements			11,946	33,524
Purchase of treasury stock			0	(5,960)
Cash dividends paid			(3,753)	(3,634)
Net cash provided by (used for) financing activities from continuing operations			8,193	23,930
Cash flows from discontinued operations
Net cash provided by (used for) operating activities from discontinued operations			(6,193)	(10,959)
Net cash provided by (used for) investing activities from discontinued operations			6	(112)
Net cash provided by (used for) financing activities from discontinued operations			0	9,550
Cash provided by (used for) discontinued operations			(6,187)	(1,521)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash			1,490	401
Cash, cash equivalents and restricted cash
(Decrease) increase for the year from continuing operations			856	(2,965)
Increase (decrease) for the year from discontinued operations			(6,187)	(1,521)
Balance at the beginning of the period			7,164	6,352	$ 6,352
Balance at the end of the period	$ 1,833	1,866	$ 1,833	1,866	7,164
As Previously Reported
Operating activities
Net income (loss) from continuing operations		397		(2,308)
Adjustments to reconcile net income (loss) from continuing operations to net cash used for operating activities:
Depreciation and amortization				3,279
Deferred income taxes				2,969
Stock compensation expense				2,430
Other				1,117
Net changes in operating assets and liabilities:
Affiliate payable				(2,199)
Trade receivables				(4,897)
Inventory				(37,641)
Other assets				(231)
Accounts payable				14,927
Other liabilities				(12,577)
Net cash provided by (used for) operating activities from continuing operations				(35,131)
Investing activities
Expenditures for property, plant and equipment				(3,305)
Other				37
Net cash provided by (used for) investing activities from continuing operations				(3,268)
Financing activities
Net additions to revolving credit agreements				43,074
Purchase of treasury stock				(5,960)
Cash dividends paid				(3,634)
Net cash provided by (used for) financing activities from continuing operations				33,480
Cash flows from discontinued operations
Net cash provided by (used for) operating activities from discontinued operations				0
Net cash provided by (used for) investing activities from discontinued operations				0
Net cash provided by (used for) financing activities from discontinued operations				0
Cash provided by (used for) discontinued operations				0
Effect of exchange rate changes on cash, cash equivalents, and restricted cash				433
Cash, cash equivalents and restricted cash
(Decrease) increase for the year from continuing operations				(4,486)
Increase (decrease) for the year from discontinued operations				0
Balance at the beginning of the period				6,352	6,352
Balance at the end of the period		1,866		1,866
Restatement Impacts
Operating activities
Net income (loss) from continuing operations		(2,597)		(3,895)
Adjustments to reconcile net income (loss) from continuing operations to net cash used for operating activities:
Depreciation and amortization				0
Deferred income taxes				32
Stock compensation expense				0
Other				(24)
Net changes in operating assets and liabilities:
Affiliate payable				0
Trade receivables				(294)
Inventory				169
Other assets				430
Accounts payable				10
Other liabilities				3,604
Net cash provided by (used for) operating activities from continuing operations				32
Investing activities
Expenditures for property, plant and equipment				0
Other				0
Net cash provided by (used for) investing activities from continuing operations				0
Financing activities
Net additions to revolving credit agreements				0
Purchase of treasury stock				0
Cash dividends paid				0
Net cash provided by (used for) financing activities from continuing operations				0
Cash flows from discontinued operations
Net cash provided by (used for) operating activities from discontinued operations				0
Net cash provided by (used for) investing activities from discontinued operations				0
Net cash provided by (used for) financing activities from discontinued operations				0
Cash provided by (used for) discontinued operations				0
Effect of exchange rate changes on cash, cash equivalents, and restricted cash				(32)
Cash, cash equivalents and restricted cash
(Decrease) increase for the year from continuing operations				0
Increase (decrease) for the year from discontinued operations				0
Balance at the beginning of the period				0	0
Balance at the end of the period		0		0
As Restated
Operating activities
Net income (loss) from continuing operations		(2,200)		(6,203)
Adjustments to reconcile net income (loss) from continuing operations to net cash used for operating activities:
Depreciation and amortization				3,279
Deferred income taxes				3,001
Stock compensation expense				2,430
Other				1,093
Net changes in operating assets and liabilities:
Affiliate payable				(2,199)
Trade receivables				(5,191)
Inventory				(37,472)
Other assets				199
Accounts payable				14,937
Other liabilities				(8,973)
Net cash provided by (used for) operating activities from continuing operations				(35,099)
Investing activities
Expenditures for property, plant and equipment				(3,305)
Other				37
Net cash provided by (used for) investing activities from continuing operations				(3,268)
Financing activities
Net additions to revolving credit agreements				43,074
Purchase of treasury stock				(5,960)
Cash dividends paid				(3,634)
Net cash provided by (used for) financing activities from continuing operations				33,480
Cash flows from discontinued operations
Net cash provided by (used for) operating activities from discontinued operations				0
Net cash provided by (used for) investing activities from discontinued operations				0
Net cash provided by (used for) financing activities from discontinued operations				0
Cash provided by (used for) discontinued operations				0
Effect of exchange rate changes on cash, cash equivalents, and restricted cash				401
Cash, cash equivalents and restricted cash
(Decrease) increase for the year from continuing operations				(4,486)
Increase (decrease) for the year from discontinued operations				0
Balance at the beginning of the period				6,352	6,352
Balance at the end of the period		1,866		1,866
Recasting Impacts
Operating activities
Net income (loss) from continuing operations		2,753		7,992
Adjustments to reconcile net income (loss) from continuing operations to net cash used for operating activities:
Depreciation and amortization				(466)
Deferred income taxes				17
Stock compensation expense				0
Other				(995)
Net changes in operating assets and liabilities:
Affiliate payable				3
Trade receivables				(906)
Inventory				(1,190)
Other assets				(1,349)
Accounts payable				6,493
Other liabilities				1,360
Net cash provided by (used for) operating activities from continuing operations				10,959
Investing activities
Expenditures for property, plant and equipment				149
Other				(37)
Net cash provided by (used for) investing activities from continuing operations				112
Financing activities
Net additions to revolving credit agreements				(9,550)
Purchase of treasury stock				0
Cash dividends paid				0
Net cash provided by (used for) financing activities from continuing operations				(9,550)
Cash flows from discontinued operations
Net cash provided by (used for) operating activities from discontinued operations				(10,959)
Net cash provided by (used for) investing activities from discontinued operations				(112)
Net cash provided by (used for) financing activities from discontinued operations				9,550
Cash provided by (used for) discontinued operations				(1,521)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash				0
Cash, cash equivalents and restricted cash
(Decrease) increase for the year from continuing operations				1,521
Increase (decrease) for the year from discontinued operations				(1,521)
Balance at the beginning of the period				0	$ 0
Balance at the end of the period		$ 0		$ 0