Consolidated Statement Of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Activities
Net loss	$ (76,541,000)	$ (42,856,000)	$ (26,190,000)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Gain on sale of business (pre-tax)	0	(7,386,000)	(24,000)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	0	0	(400,000)
Depreciation and amortization	14,631,000	14,635,000	18,204,000
Provision for losses on trade and installment receivables	2,042,000	1,059,000	754,000
Provision (benefit) for deferred income taxes	(4,370,000)	901,000	3,588,000
Provision for other deferred liabilities	589,000	996,000	266,000
Provision for stock-based compensation	7,347,000	6,894,000	4,013,000
Loss (gain) on disposals of property and equipment	(87,000)	51,000	5,135,000
Loss on debt extinguishment including debt finance charges and associated fees	0	0	(668,000)
Impairment of an intangible asset	320,000	0	0
Amortization of convertible debt discount	8,811,000	5,454,000	796,000
Amortization of Debt Issuance Costs	2,220,000	1,991,000	558,000
Loss (gain) on Convertible Debt Derivatives	3,657,000	(1,268,000)	0
Changes in operating assets and liabilities:
Trade receivables	2,395,000	10,210,000	9,164,000
Installment sales contracts, net	(930,000)	(1,236,000)	283,000
Inventories	22,263,000	(9,944,000)	11,610,000
Other current assets	1,925,000	84,000	5,283,000
Accounts payable	(2,168,000)	(13,648,000)	(7,240,000)
Accrued expenses	(5,711,000)	(18,491,000)	(22,003,000)
Other long-term liabilities	(2,167,000)	(4,059,000)	(9,843,000)
Net Cash Used by Operating Activities	(25,774,000)	(56,613,000)	(5,378,000)
Investing Activities
Purchases of property and equipment	(14,569,000)	(10,151,000)	(7,522,000)
Proceeds from sale of property and equipment	369,000	42,000	23,117,000
Proceeds from sale of businesses	0	13,829,000	13,700,000
Decrease in other long-term assets	(361,000)	(167,000)	15,003,000
Other	(87,000)	96,000	78,000
Net Cash Provided (Used) for Investing Activities	(14,648,000)	3,649,000	44,376,000
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	95,220,000	122,025,000	219,603,000
Payments on revolving lines of credit and long-term borrowings	(16,308,000)	(2,830,000)	(232,808,000)
Proceeds from exercise of equity awards	2,676,000	17,000	2,402,000
Payment of financing costs	(4,711,000)	(6,125,000)	(1,954,000)
Payment of dividends	(1,604,000)	(1,583,000)	(1,589,000)
Proceeds from Issuance of Warrants	14,100,000	12,376,000	0
Payments for Repurchase of Common Stock	(1,276,000)	(5,331,000)	0
Net Cash Provided (Used) by Financing Activities	88,097,000	118,549,000	(14,346,000)
Effect of exchange rate changes on cash	4,619,000	(1,406,000)	(3,528,000)
Increase in cash and cash equivalents	52,294,000	64,179,000	21,124,000
Cash and cash equivalents at beginning of year	124,234,000	60,055,000	38,931,000
Cash and cash equivalents at end of year	$ 176,528,000	$ 124,234,000	$ 60,055,000