Condensed Consolidated Statement Of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net earnings (loss)	$ 732,000	$ (13,886,000)
Adjustments to reconcile net loss to net cash used by operating activities:
Gain on sale of business	9,590,000	0
Depreciation and amortization	3,407,000	3,898,000
Amortization operating lease right of use assets	1,937,000	2,172,000
Provision (benefit) for losses on trade and installment receivables	(71,000)	185,000
Benefit for deferred income taxes	240,000	329,000
Provision for other deferred liabilities	469,000	234,000
Provision for equity compensation	1,200,000	1,430,000
Loss on disposals of property and equipment	1,000	54,000
Amortization of convertible debt discount	2,732,000	3,099,000
Amortization of debt fees	475,000	615,000
Loss on convertible debt derivatives	0	(273,000)
Changes in operating assets and liabilities:
Trade receivables	1,627,000	3,535,000
Installment sales contracts, net	26,000	13,000
Inventories	(2,930,000)	(1,588,000)
Other current assets	(10,934,000)	(3,957,000)
Accounts payable	7,950,000	(4,683,000)
Accrued expenses	(5,787,000)	(12,794,000)
Other long-term liabilities	(1,323,000)	(1,517,000)
Net Cash Provided by (Used in) Operating Activities	(9,839,000)	(22,588,000)
Investing Activities
Purchases of property and equipment	(2,121,000)	(1,812,000)
Proceeds from sale of property and equipment	4,000	20,000
Proceeds from sale of business	14,563,000	0
Change in other long-term assets	(135,000)	(20,000)
Other	2,113,000	0
Net Cash Provided (Used) by Investing Activities	10,198,000	(1,812,000)
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	21,600,000	0
Capital leases payments	(266,000)	(866,000)
Payment of dividends	(414,000)	(408,000)
Purchase of treasury stock	(773,000)	(381,000)
Net Cash Provided (Used) by Financing Activities	20,147,000	(1,655,000)
Effect of exchange rate changes on cash	(1,637,000)	1,074,000
Cash, Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	18,869,000	(24,981,000)
Cash and cash equivalents at beginning of year	80,063,000	116,907,000
Cash and cash equivalents at end of period	$ 98,932,000	$ 91,926,000