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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (1,043) $ (4,759)
Loss from discontinued operations   (210)
Loss from continuing operations (1,043) (4,549)
Adjustments to reconcile net cash used in operating activities:    
Depreciation and amortization expense 3,114 3,986
Stock-based compensation 223 427
Allowance for doubtful accounts 42 (154)
Common stock issued under defined contribution 401(k) plan 163 138
Loss on disposal of assets 5 15
Changes in operating assets and liabilities:    
Accounts receivable (4,947) (6,156)
Inventories (1,980) (8,058)
Prepaid expenses and other current assets 457 (503)
Accounts payable (2,672) 7,852
Accrued liabilities (788) (69)
Customer deposits (4,266) 4,149
Other non-current assets and liabilities (425) 82
Net cash used in operating activities (12,117) (2,840)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of available for sale securities (2,543)  
Sales and maturities of available for sale securities 1,890  
Purchases of property and equipment (2,200) (1,375)
Proceeds from disposals of property and equipment 45 4
Net cash used in investing activities (2,808) (1,371)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payments on lines of credit and notes payable (164) (44,606)
Proceeds from lines of credit and notes payable   49,408
Principal payments on capital leases (246) (570)
Net cash (used in) provided by financing activities (410) 4,232
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS (15,335) 21
CASH AND CASH EQUIVALENTS, beginning of the period 24,936 516
CASH AND CASH EQUIVALENTS, end of the period 9,601 537
Supplemental cash flow information:    
Interest paid 143 334
Income taxes paid 2 13
Non-cash investing and financing activities:    
Issuance of restricted stock grants $ 138 $ 317