Notes Payable and Stock Purchase Warrants - Amended Agreement (Details)	Jun. 30, 2016 USD ($) installment
Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	$ 30,000,000
Oxford Notes
Notes payable
Amount used to retire existing loans	11,000,000
Final payment fee, notes	1,000,000
Term Notes Payable \| Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	$ 30,000,000
Number of tranches under facility \| installment	4
Prepayment fee percentage within one year of funding	3.00%
Prepayment fee percentage second year after funding date	2.00%
Prepayment fee percentage after second anniversary of funding	1.00%
Debt default, interest rate (as a percent)	5.00%
Term Notes Payable \| Amended and Restated Loan and Security Agreement \| LIBOR
Notes payable
Floating annual rate, spread (as a percent)	6.31%
90-day U.S. Dollar LIBOR	90-day U.S. Dollar LIBOR
Term Notes Payable \| Amended and Restated Loan and Security Agreement \| Floor interest rate
Notes payable
Floating annual rate, spread (as a percent)	0.64%
Term Notes Payable \| Amended and Restated Loan and Security Agreement \| Floor interest rate \| Minimum
Notes payable
Interest rate (as a percent)	6.95%
Term Notes Payable \| Amended and Restated Loan and Security Agreement \| Interest only period
Notes payable
Frequency of payment	monthly
Repayment period	18 months
Type of payment required	interest-only
Term Notes Payable \| Amended and Restated Loan and Security Agreement \| Amortization period
Notes payable
Frequency of payment	monthly
Repayment period	30 months
Type of payment required	principal and interest
Tranche 1 Term Loan \| Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	$ 15,000,000
Proceeds from notes payable	15,000,000
Tranche 2 Term Loan \| Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	5,000,000
Tranche 3 Term Loan \| Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	5,000,000
Tranche 4 Term Loan \| Amended and Restated Loan and Security Agreement
Notes payable
Maximum amount available under facility	$ 5,000,000
Trailing revenue period	6 months
Tranche 4 Term Loan \| Amended and Restated Loan and Security Agreement \| Minimum
Notes payable
Trailing six month revenue requirement	$ 4,000,000

Threshold period used for trailing revenue for the applicable period of measurement.

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In the event of default, contractual interest rate for funds borrowed under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

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-SubTopic 10
-Section S99
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-Name Accounting Standards Codification
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-SubTopic 10
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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