Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Cash received from customers	$ 45,227,000	$ 48,248,000
Cash paid to suppliers and employees	(48,328,000)	(51,243,000)
Cash from Continued Dumping and Subsidy Offset Act, net	433,000	1,103,000
Interest paid, net	(3,000)	(191,000)
Income tax payments	19,000	(510,000)
Net cash used in operating activities	(2,652,000)	(2,593,000)
Cash flows from investing activities:
Proceeds from surrender of corporate-owned life insurance policies		28,139,000
Decrease in restricted cash	32,000
Proceeds from sale of assets	24,000
Purchase of other assets	(22,000)	(14,000)
Net cash provided by investing activities	34,000	28,125,000
Cash flows from financing activities:
Stock purchase and retirement for tax withholdings on vesting of restricted awards	(136,000)	(15,000)
Payments on insurance policy loans		(5,495,000)
Payment of dividends	(483,000)	(21,282,000)
Purchase and retirement of common stock		(1,012,000)
Net cash used in financing activities	(619,000)	(27,804,000)
Cash flows from discontinued operations:
Cash used in operating activities		(13,000)
Net cash used in discontinued operations		(13,000)
Net decrease in cash	(3,237,000)	(2,285,000)
Cash at beginning of year	4,212,000	6,497,000
Cash at end of year	975,000	4,212,000
Net loss	(7,709,000)	(5,258,000)
Depreciation	171,000	181,000
Amortization	290,000	289,000
Stock-based compensation	423,000	338,000
Gain on sale of property, plant and equipment	(16,000)
Changes in assets and liabilities:
Accounts receivable	346,000	3,433,000
Inventories	(280,000)	(2,017,000)
Prepaid expenses and other assets	169,000	(176,000)
Accounts payable	3,578,000	233,000
Accrued salaries, wages and benefits	266,000	(250,000)
Other accrued expenses	368,000	235,000
Other long-term liabilities	(258,000)	399,000
Net cash used in operating activities	$ (2,652,000)	$ (2,593,000)