Notes Payable (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Dec. 31, 2014	Apr. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Notes Payable
Current portion of long term debt			$ 1,750		$ 1,750
Interest Expense			117	$ 29	232	$ 32
Long-term debt			$ 7,000		$ 7,000
Credit facility
Notes Payable
Proceeds from the issuance of debt		$ 2,000
Accrued interest rate (as a percent)			5.50%		5.50%
Variable interest rate					prime
Variable rate basis (as a percent)					2.25%
Monthly payments (as a percent)					2.80%
Available			$ 12,000		$ 12,000
Borrowed			$ 7,000		7,000
Extension period			6 months
Current portion of long term debt			$ 1,800		1,800
Interest Expense			117		232
Accrued interest			38		38
Term Loan Tranche A
Notes Payable
Available			2,000		2,000
Borrowed			$ 2,000		$ 2,000
Term Loan Tranche B
Notes Payable
Accrued interest rate (as a percent)			6.50%		6.50%
Available			$ 5,000		$ 5,000
Borrowed			5,000		$ 5,000
Proceeds from line of credit	$ 5,000
Term Loan Tranche B | Prime rate
Notes Payable
Variable interest rate					prime
Variable rate basis (as a percent)					3.50%
Term Loan Tranche C
Notes Payable
Available			2,500		$ 2,500
Term Loan Tranche D
Notes Payable
Available			$ 2,500		$ 2,500