Liquidity (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Line of Credit Facility [Line Items]
Cash and cash equivalents	$ 5,995	$ 5,558	$ 3,758	$ 3,908
Net working capital	4,700
Amount of unused availability under the line	2,600
Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum availability	6,000
Amount of unused availability under the line	1,200
Unbilled receivables
Line of Credit Facility [Line Items]
Maximum availability	$ 1,000
Interest rate (percent)	4.00%	4.00%
Accounts receivables
Line of Credit Facility [Line Items]
Maximum availability	$ 3,000
Interest rate (percent)	4.00%
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Amount of unused availability under the line	$ 1,400