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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Dec. 31, 2011
CURRENT ASSETS:        
Cash and cash equivalents $ 22,826 $ 516 $ 2,721 $ 13,340
Short-term investments 867 0    
Restricted cash 331 330    
Accounts receivable, net of allowance for doubtful accounts of $179 and $453 as of September 30, 2013 and December 31, 2012, respectively 21,777 20,039    
Accounts receivable, allowance for doubtful accounts 179 453 515 438
Inventories, net 32,856 21,988    
Prepaid expenses and other current assets 2,532 3,836    
Assets held for sale 2,152 8,042    
Total current assets 83,341 54,751    
Property and equipment, net 72,761 79,889    
Intangible assets, net 6,014 7,454    
Other assets 2,194 816    
TOTAL ASSETS 164,310 142,910    
CURRENT LIABILITIES:        
Current maturities of long-term debt 342 352    
Current portions of capital lease obligations 1,308 2,217    
Accounts payable 28,125 16,377    
Accrued liabilities 7,030 6,012    
Customer deposits 21,482 4,063    
Total current liabilities 58,287 33,836    
LONG-TERM LIABILITIES:        
Long-term debt, net of current maturities 2,757 2,956    
Long-term capital lease obligations, net of current portions 1,431 641    
Other 3,342 2,169    
Total long-term liabilities 7,530 5,766    
STOCKHOLDERS' EQUITY:        
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001    
Preferred stock, shares authorized 10,000,000 10,000,000    
Preferred stock, shares issued 0 0    
Preferred stock, shares outstanding 0 0    
Common stock, $0.001 par value; 30,000,000 shares authorized; 14,563,228 and 14,197,792 shares issued and outstanding as of September 30, 2013 and December 31, 2012, respectively 15 14    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001    
Common stock, shares authorized 30,000,000 30,000,000    
Common stock, shares issued 14,563,228 14,197,792   13,977,920
Common stock, shares outstanding 14,563,228 14,197,792    
Additional paid-in capital 375,542 373,605    
Accumulated deficit (277,064) (270,311)    
Total stockholders' equity 98,493 103,308   117,859
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 164,310 142,910    
As Previously Reported
        
CURRENT ASSETS:        
Cash and cash equivalents 22,826 516    
Short-term investments 867      
Restricted cash 331      
Accounts receivable, net of allowance for doubtful accounts of $179 and $453 as of September 30, 2013 and December 31, 2012, respectively 21,927      
Inventories, net 32,625      
Prepaid expenses and other current assets 2,532      
Assets held for sale 2,152      
Total current assets 83,260      
Property and equipment, net 72,761      
Intangible assets, net 6,014      
Other assets 2,194      
TOTAL ASSETS 164,229      
CURRENT LIABILITIES:        
Current maturities of long-term debt 342      
Current portions of capital lease obligations 1,308      
Accounts payable 29,063      
Accrued liabilities 6,961      
Customer deposits 21,482      
Total current liabilities 59,156      
LONG-TERM LIABILITIES:        
Long-term debt, net of current maturities 2,757      
Long-term capital lease obligations, net of current portions 1,431      
Other 3,342      
Total long-term liabilities 7,530      
STOCKHOLDERS' EQUITY:        
Common stock, $0.001 par value; 30,000,000 shares authorized; 14,563,228 and 14,197,792 shares issued and outstanding as of September 30, 2013 and December 31, 2012, respectively 15      
Additional paid-in capital 375,542      
Accumulated deficit (278,014)      
Total stockholders' equity 97,543      
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY 164,229      
Restatement Adjustments
        
CURRENT ASSETS:        
Accounts receivable, net of allowance for doubtful accounts of $179 and $453 as of September 30, 2013 and December 31, 2012, respectively (150)      
Inventories, net 231      
Total current assets 81      
TOTAL ASSETS 81      
CURRENT LIABILITIES:        
Accounts payable (938)      
Accrued liabilities 69      
Total current liabilities (869)      
STOCKHOLDERS' EQUITY:        
Accumulated deficit 950      
Total stockholders' equity 950      
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY $ 81