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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 319 $ (21,807)
Loss from discontinued operations (1,016) (9,561)
Income (loss) from continuing operations 1,335 (12,246)
Adjustments to reconcile net cash used in operating activities:    
Depreciation and amortization expense 6,914 9,179
Impairment charges   183
Stock-based compensation 753 919
Allowance for doubtful accounts 61 35
Gain on disposal of assets (217) (98)
Changes in operating assets and liabilities:    
Accounts receivable (2,141) 7,223
Inventories 3,060 6,925
Prepaid expenses and other current assets (933) (25)
Accounts payable 989 (3,625)
Accrued liabilities 297 (1,126)
Customer deposits 8,057 (12,457)
Other non-current assets and liabilities (875) (399)
Net cash provided by (used in) operating activities of continuing operations 17,300 (5,512)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available for sale securities (19,223) (8,062)
Sales of available for sale securities 13,061 5,082
Maturities of available for sale securities 9,170 4,825
Purchases of property and equipment (6,624) (2,789)
Proceeds from disposals of property and equipment 452 1,156
Net cash (used in) provided by investing activities of continuing operations (3,164) 212
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from issuance of stock 19  
Payments on lines of credit and notes payable   (118,212)
Proceeds from lines of credit and notes payable   118,212
Proceeds from long-term debt   5,000
Payments on long-term debt (2,799) (2,201)
Principal payments on capital leases (539) (747)
Net cash (used in) provided by financing activities of continuing operations (3,319) 2,052
DISCONTINUED OPERATIONS:    
Operating cash flows 731 (5,327)
Investing cash flows 615 2,864
Financing cash flows 58 (3)
Net cash provided by (used in) discontinued operations 1,404 (2,466)
Add: Cash balance of discontinued operations, beginning of period   93
Less: Cash balance of discontinued operations, end of period 2  
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH 12,219 (5,621)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH beginning of the period 6,519 12,140
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH end of the period 18,738 6,519
Supplemental cash flow information:    
Interest paid 494 652
Income taxes paid 23 48
Non-cash investing and financing activities:    
Issuance of restricted stock grants 753 $ 919
Equipment addition via capital lease $ 1,616