Credit Arrangements Loan and Security Agreement (Details) - USD ($)			3 Months Ended
	May 11, 2018	Dec. 14, 2015	Dec. 31, 2018	Dec. 31, 2017	Apr. 25, 2019	Feb. 28, 2019	Feb. 14, 2019	Jan. 31, 2019	Jan. 04, 2019	Nov. 08, 2018	Sep. 30, 2018	Apr. 16, 2018
Line of Credit Facility [Line Items]
Number of securities called by warrants or rights (in shares)												232,558
Exercise price of warrant (in usd per share)												$ 2.50
Derivative liability, at fair value			$ (2,000)								$ (14,000)
Gain on derivative			15,000	$ 3,000
Interest expense, net			(154,000)	$ (92,000)
Partners for Growth IV, L.P. | Tranche One
Line of Credit Facility [Line Items]
PFG debt, net of discount	$ 2,000,000
Partners for Growth IV, L.P. | Tranche Two
Line of Credit Facility [Line Items]
PFG debt, net of discount	500,000									$ 500,000
Partners For Growth V, L.P. [Member]
Line of Credit Facility [Line Items]
PFG debt, net of discount	$ 2,500,000
Number of securities called by warrants or rights (in shares)	66,000
Exercise price of warrant (in usd per share)	$ 2.57
Gain on derivative			15,000
Debt instrument fee	$ 150,000		150,000
Interest expense, net			(13,000)
Partners For Growth V, L.P. [Member] | Warrant
Line of Credit Facility [Line Items]
Derivative liability, at fair value			$ (2,000)
Partners For Growth V, L.P. [Member] | Warrant Debt
Line of Credit Facility [Line Items]
Debt discount accreted as interest expense		$ 153,000
Debt interest expense term			5 years
Partners For Growth V, L.P. [Member] | PFG Debt
Line of Credit Facility [Line Items]
Debt interest expense term			3 years
Amortization of debt discount			$ 13,000
Partners For Growth V, L.P. [Member] | Tranche One
Line of Credit Facility [Line Items]
PFG debt, net of discount	$ 2,000,000
Debt instrument, interest rate, percentage	10.75%										10.75%
Prepayment fee	1.00%
Subsequent Event
Line of Credit Facility [Line Items]
Number of securities called by warrants or rights (in shares)						728,155
Exercise price of warrant (in usd per share)					$ 1.18	$ 1.18
Subsequent Event | Secured Debt | Promissory Note
Line of Credit Facility [Line Items]
Face amount of debt							$ 1,000,000	$ 1,000,000	$ 1,000,000
Debt instrument, interest rate, percentage							9.25%	9.25%	9.25%
Debt Instrument, Redemption, Period One [Member] | Partners For Growth V, L.P. [Member]
Line of Credit Facility [Line Items]
Exchange price of warrants (in usd per share)	$ 250,000
Level 3 | PFG V Debt, Net of Discount
Line of Credit Facility [Line Items]
Disbursement of Tranche 2, net of discount		$ 2,300,000	471,000
Amortization and accretion expense			24,000
Liability			2,317,000								$ 1,905,000
Level 3 | Warrant Debt
Line of Credit Facility [Line Items]
Liability			133,000
Level 3 | Warrant Debt, PFG V
Line of Credit Facility [Line Items]
Disbursement of Tranche 2, net of discount			26,000
Amortization and accretion expense			4,000
Liability			$ 133,000								$ 103,000