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Convertible Notes (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 14, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Aug. 31, 2017	Feb. 28, 2017	Aug. 31, 2016
Convertible Notes
Interest Expense			$ 238,000	$ 217,000	$ 685,000	$ 464,000
Maximum
Convertible Notes
Period for outstanding balance of accounts receivable has not recorded an allowance for doubtful accounts (in days)	90 days
Senior Secured Convertible Notes due August 15 2018
Convertible Notes
Stated interest rate (as a percent)	10.00%	10.00%
Principal amount	$ 8,000,000	$ 8,000,000	9,200,000		9,200,000
Conversion price (in dollars per share)	$ 9.00
Minimum ownership percentage triggering event for redemption of notes	40.00%
Redemption price (as a percent)	120.00%
Minimum amount of shares issuable if prior to maturity date of debt instrument for resetting conversion price	$ 1,000,000
Maximum amount of indebtedness subordinated by security interest and cash payment rights under debt instruments	$ 5,000,000	$ 5,000,000
Debt issuance costs			100,000		100,000
Interest Expense			11,000		33,000
Remaining unamortized debt discount			$ 42,000		$ 42,000
Senior Secured Convertible Notes due August 15 2018 | Minimum
Convertible Notes
Percentage of beneficial ownership if effective upon conversion date of debt instrument	9.90%
Interest Note
Convertible Notes
Principal amount							$ 434,000	$ 420,000	$ 336,000
Conversion price (in dollars per share)			$ 8.50		$ 8.50
Number of shares issuable if notes converted to shares of common stock					1,081,166
Interest Note | Minimum
Convertible Notes
Conversion price (in dollars per share)			$ 8.50		$ 8.50

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The percentage of beneficial ownership if effective upon the applicable conversion date of debt instrument.

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The period for outstanding balance of accounts receivable has not recorded an allowance for doubtful accounts pledged under the debt instrument conversion features, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The minimum amount of shares issuable for considering the change in conversion price of debt instrument if prior to the maturity date.

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The maximum amount of indebtedness subordinated by security interest and cash payment rights under the convertible debt instruments.

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The number of shares of common stock that the holder of the debt instrument would receive if the debt was converted to common stock.

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Represents the minimum beneficial ownership percentage which triggers, at the election of the holders, redemption of the notes.

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The price per share of the conversion feature embedded in the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount, after accumulated amortization, of debt discount.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of the cost of borrowed funds accounted for as interest expense.

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