Condensed Consolidated Statement Of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Gain (Loss) on Disposition of Business	$ 0	$ (7,386,000)
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	13,829,000
Operating Activities
Net loss	(58,879,000)	(25,216,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	10,958,000	10,911,000
Provision for losses on trade and installment receivables	1,187,000	348,000
Benefit for deferred income taxes	(806,000)	(301,000)
Provision for other deferred liabilities	537,000	557,000
Provision for stock-based compensation	6,629,000	5,534,000
Loss (gain) on disposals of property and equipment	(87,000)	51,000
Amortization of convertible debt discount	6,094,000	3,809,000
Amortization of debt fees	1,597,000	1,435,000
Loss (gain) on convertible debt derivatives	(2,700,000)	2,282,000
Changes in operating assets and liabilities:
Trade receivables	(3,153,000)	5,169,000
Installment sales contracts, net	(903,000)	(1,214,000)
Inventories	930,000	(16,986,000)
Other current assets	2,351,000	772,000
Accounts payable	(12,491,000)	(8,017,000)
Accrued expenses	(7,775,000)	(12,165,000)
Other long-term liabilities	(2,256,000)	(4,404,000)
Net Cash Used by Operating Activities	(53,367,000)	(49,385,000)
Investing Activities
Purchases of property and equipment	(7,389,000)	(6,797,000)
Proceeds from sale of property and equipment	211,000	29,000
Change in other long-term assets	(239,000)	(172,000)
Other	(85,000)	78,000
Net Cash Provided (Used) by Investing Activities	(7,502,000)	6,967,000
Financing Activities
Proceeds from revolving lines of credit and long-term borrowings	95,220,000	121,976,000
Payments on revolving lines of credit and long-term borrowings	(15,914,000)	(2,555,000)
Proceeds from exercise of stock options	1,761,000	17,000
Payment of financing costs	(4,711,000)	(5,966,000)
Payment of dividends	(1,200,000)	(1,188,000)
Issuance of warrants	14,100,000	12,376,000
Purchase of treasury stock	(1,221,000)	(5,298,000)
Net Cash Provided by Financing Activities	88,035,000	119,362,000
Effect of exchange rate changes on cash	4,564,000	1,428,000
Increase in cash and cash equivalents	31,730,000	78,372,000
Cash and cash equivalents at beginning of year	124,234,000	60,055,000
Cash and cash equivalents at end of period	$ 155,964,000	$ 138,427,000