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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 13,785 $ 10,789 [1]
Accounts receivable, net of allowance for doubtful accounts of $139 at June 30, 2012 and $162 at December 31, 2011 5,924 5,551 [1]
Inventories, net 7,539 6,659 [1]
Prepaid expenses and other current assets 1,228 464 [1]
Current assets of discontinued operations 558 6,043 [1]
Total current assets 29,034 29,506 [1]
Property and equipment, net 388 325 [1]
Intangible assets, net 653 745 [1]
Goodwill 533 533 [1]
Other long-term assets 170 199 [1]
Restricted cash related to discontinued operations 510 0 [1]
Non-current assets of discontinued operations 4 841 [1]
Total assets 31,292 32,149 [1]
Current liabilities:    
Accounts payable 2,139 1,580 [1]
Accrued compensation 1,296 1,180 [1]
Accrued expenses 1,037 1,920 [1]
Accrued warranty 525 556 [1]
Deferred revenue 800 1,014 [1]
Current liabilities of discontinued operations 79 2,663 [1]
Total current liabilities 5,876 8,913 [1]
Long-term liabilities:    
Other long-term liabilities 649 810 [1]
Total liabilities 6,525 9,723 [1]
Stockholders' equity:    
Convertible preferred stock, $0.01 par value: Authorized: 2,000,000 shares; Issued and outstanding: 500,000 shares at June 30, 2012 and at December 31, 2011 5 5 [1]
Common stock, $0.01 par value: Authorized: 30,000,000 shares; Issued and outstanding 8,981,445 and 8,917,824 shares at June 30, 2012 and December 31, 2011, respectively 93 92 [1]
Additional paid-in capital 42,692 42,032 [1]
Accumulated other comprehensive loss 0 (35) [1]
Treasury stock, at cost (343,355 and 167,885 shares at June 30, 2012 and December 31, 2011, respectively) (1,374) (1,078) [1]
Accumulated deficit (16,649) (18,590) [1]
Total stockholders' equity 24,767 22,426 [1]
Total liabilities and stockholders' equity $ 31,292 $ 32,149 [1]
[1] Derived from the audited consolidated financial statements included in the annual report filed on Form 10-K with the SEC for the year ended December 31, 2011.