Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities - Schedule of Accrued Liabilities (Details)

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Accrued Liabilities - Schedule of Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Accrued Liabilities Current [Abstract]    
Commissions $ 841 $ 989
Payroll and related expenses 817 645
Royalties 283 277
Interest payable 100 119
Final loan payment fees 1,532 1,281
Offering costs 0 323
Deferred rent 37 32
Professional services 292  
Other 62 45
Accrued Liabilities, Total $ 3,964 $ 3,711