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Long-term Debt (Details) - USD ($)			3 Months Ended		9 Months Ended
	Dec. 29, 2017	May 29, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 20, 2017	Jun. 15, 2016	May 11, 2016	May 10, 2016
Debt Instrument [Line Items]
Number of shares callable by warrants (in shares)								1	1,100,000	16,000,000
Warrant exercise price (in dollars per share)								$ 3.06
Minimum liquidity covenant			$ 1,500,000		$ 1,500,000
Interest expense			474,000	$ 645,000	1,603,000	$ 1,947,000
Non-cash amortization			$ 200,000	$ 200,000	$ 600,000	$ 700,000
LIBOR [Member] | Interest Rate Floor [Member]
Debt Instrument [Line Items]
Basis variable rate		1.00%
Term Loan [Member]
Debt Instrument [Line Items]
Origination Date					May 29, 2015
Original Loan Amount		$ 17,700,000
Basis variable rate		7.95%
Maturity date					Jun. 01, 2019
Fees amount associated with loan		$ 1,100,000
Number of shares callable by warrants (in shares)		94,441
Warrant exercise price (in dollars per share)		$ 10.35
Date from which warrants are exercisable					Nov. 30, 2015
Warrant expiration date					May 29, 2025
Minimum liquidity covenant		$ 5,000,000					$ 1,500,000
Extended interest-only period					Jan. 01, 2018
Further extension period					Aug. 01, 2018
Debt instrument, interest-only period					The Amendment also extends the interest-only period under the Loan Agreement to January 1, 2018, with a further extension through August 1, 2018 if the Company receives unrestricted net cash proceeds of at least $5 million on or before December 29, 2017.
Debt instrument, covenant compliance					we were in compliance with all of the debt covenants under the Loan and Security Agreement.
Minimum [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Interest rate		8.95%
Minimum [Member] | Term Loan [Member] | Scenario Forecast [Member]
Debt Instrument [Line Items]
Net proceeds receives from unrestricted cash	$ 5,000,000
Maximum [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Original Loan Amount							$ 3,000,000

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