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Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Mar. 31, 2015
Dec. 31, 2014
Allowance for doubtful accounts $ 79 $ 58
Common Stock:    
Par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 50,000,000 50,000,000
Common stock, sharse issued (in shares) 9,111,790 9,097,827
Common stock, shares outstanding (in shares) 9,111,790 9,097,827