Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (11,762)	$ (2,622)
Net loss from discontinued operations, net of tax		(49)
Net loss from continuing operations	(11,762)	(2,573)
Adjustments to reconcile net loss from continuing operations to net cash used in operating activities:
Provision for doubtful accounts	381	712
Provision for obsolete inventory	412	(160)
Provision for warranty	83	319
Depreciation and amortization	1,953	1,563
Equity method investment loss (income)	244	(1,516)
Fair value adjustment to notes receivable	(953)
Deferred income taxes	(146)	715
Amortization of contract acquisition costs	29
Impairment of contract acquisition costs	59
Stock-based compensation expense	648	498
Impairment of operating lease	209
Loss on disposal of assets	2,130
Dividends received from investee	817
Changes in operating assets and liabilities:
Accounts receivable	(4,244)	385
Inventories	413	(134)
Other current assets	(629)	(41)
Other assets	(392)	(85)
Accounts payable	171	1,197
Accrued expenses	244	(763)
Deferred revenue and customer deposits	1,359	(1,204)
Current income taxes	178	174
Net cash flows used in operating activities - continuing operations	(8,796)	(913)
Net cash flows used in operating activities - discontinued operations		(147)
Net cash used in operating activities	(8,796)	(1,060)
Cash flows from investing activities:
Proceeds from sale of equity securities	4,531
Purchase of equity securities		(2,525)
Dividends received from investee in excess of cumulative earnings	69	230
Capital expenditures	(1,220)	(2,949)
Proceeds from sale of business		60
Net cash provided by (used in) investing activities	3,380	(5,184)
Cash flows from financing activities:
Proceeds from sale-leaseback financing	7,000
Proceeds from issuance of short-term debt	3,205	500
Proceeds from issuance of long-term debt		2,000
Principal payments on long-term debt	(2,278)	(17)
Principal payments on short-term debt	(1,097)
Payment of debt issuance costs	(22)	(46)
Payments on capital lease obligations	(147)	(188)
Purchase of treasury stock		(102)
Proceeds from exercise of stock options		71
Other	(8)
Net cash provided by financing activities	6,653	2,218
Effect of exchange rate changes on cash and cash equivalents	(98)	304
Net increase (decrease) in cash and cash equivalents and restricted cash	1,139	(3,722)
Discontinued operations activity included above:
Add: Cash balance included in assets held for sale at beginning of period		175
Less: Cash balance included in assets held for sale at end of period
Cash and cash equivalents and restricted cash at beginning of period	4,870	7,596
Cash and cash equivalents and restricted cash at end of period	6,009	4,049
Components of cash and cash equivalents and restricted cash:
Cash and cash equivalents	5,659	4,049
Restricted cash	350
Total cash and cash equivalents and restricted cash	6,009	4,049
Supplemental disclosure of non-cash investing and financing activities:
Term loan borrowings to finance equipment purchases	$ 4,121