Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net income	$ 5,846	$ 1,224	$ 2,610
Adjustments to reconcile net income to net cash provided by operating activities:
Impairment charges	1,401	0	0
Depreciation and amortization	8,905	8,789	8,824
Debt issuance costs amortization	155	131	134
Deferred income taxes	376	689	(768)
Gain on sale of assets	(38)	(38)	(26)
Gain on dissolution of subsidiary	(833)	0	0
Unrealized foreign currency transaction loss	(296)	524	404
Changes in operating assets and liabilities, net of businesses acquired:
Accounts receivable	(2,993)	(284)	3,942
Restricted cash	411	(927)	827
Inventories	6,451	252	(1,442)
Other assets	(925)	(372)	834
Accounts payable	611	141	450
Customer deposits	4,421	(776)	7,762
Accrued expenses	1,658	(3,964)	3,250
Accrued pension and postretirement liabilities	(35)	(92)	(74)
Net cash provided by operating activities	25,115	5,297	26,727
Investing activities
Capital expenditures	(3,207)	(2,479)	(4,210)
Deposit on assets held for sale	516	0	0
Proceeds from sales of assets	68	118	69
Net cash used in investing activities	(2,623)	(2,361)	(4,141)
Financing activities
Proceeds from short-term notes payable to bank	20,987	42,820	32,502
Repayments of short-term notes payable to bank	(21,734)	(42,114)	(32,502)
Repayments of long-term debt	(6,088)	(5,761)	(4,464)
Dividends paid	(526)	(1,052)	(1,037)
Purchases of treasury stock	(80)	(368)	(201)
Net cash used in financing activities	(7,441)	(6,475)	(5,702)
Effect of exchange rate changes on cash	1,652	(980)	(403)
Net increase (decrease) in cash	16,703	(4,519)	16,481
Cash and cash equivalents at beginning of period	28,255	32,774	16,293
Cash and cash equivalents at end of period	$ 44,958	$ 28,255	$ 32,774