Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities
Net income (loss)	$ 1,224	$ 2,610	$ (2,140)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairment charges	0	0	5,766
Depreciation and amortization	8,789	8,824	10,169
Debt issuance costs amortization	131	134	85
Deferred income taxes	689	(768)	446
Gain on sale of assets	(38)	(26)	(82)
Gain on sale of business	0	0	(218)
Gain on purchase of business	0	0	(462)
Unrealized foreign currency transaction loss	524	404	350
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(284)	3,942	(7,860)
Restricted cash	(927)	827	973
Inventories	252	(1,442)	(1,303)
Other assets	(372)	834	317
Accounts payable	141	450	2,211
Customer deposits	(776)	7,762	(1,783)
Accrued expenses	(3,964)	3,250	(3,281)
Accrued pension and postretirement liabilities	(92)	(74)	(9)
Net cash provided by operating activities	5,297	26,727	3,179
Investing activities
Acquisition of businesses, net of cash acquired	0	0	(5,683)
Capital expenditures	(2,479)	(4,210)	(3,186)
Proceeds from disposal of business	0	0	218
Proceeds from sales of assets	118	69	151
Net cash used in investing activities	(2,361)	(4,141)	(8,500)
Financing activities
Payment of contingent consideration	0	0	(7,500)
Proceeds from short-term notes payable to bank	42,820	32,502	21,143
Repayments of short-term notes payable to bank	(42,114)	(32,502)	(21,143)
Repayments of long-term debt	(5,761)	(4,464)	(9,296)
Dividends paid	(1,052)	(1,037)	(1,012)
Net proceeds from sales of common stock	0	0	5,678
Purchases of treasury stock	(368)	(201)	0
Net cash used in financing activities	(6,475)	(5,702)	(12,130)
Effect of exchange rate changes on cash	(980)	(403)	(978)
Net (decrease) increase in cash	(4,519)	16,481	(18,429)
Cash and cash equivalents at beginning of period	32,774	16,293	34,722
Cash and cash equivalents at end of period	$ 28,255	$ 32,774	$ 16,293