Liquidity (Details) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Line of Credit Facility [Line Items]
Cash and cash equivalents	$ 5,558,000				$ 3,908,000				$ 5,558,000	$ 3,908,000	$ 3,408,000
Net working capital	4,600,000								4,600,000
Income before taxes	2,424,000	$ 729,000	$ (136,000)	$ 223,000	$ 178,000	$ 251,000	$ 198,000	$ 133,000	3,240,000	$ 760,000
Amount of unused availability under the line	2,640,000								2,640,000
Line of Credit [Member]
Line of Credit Facility [Line Items]
Maximum availability	6,000,000								6,000,000
Amount of unused availability under the line	1,290,000								1,290,000
Unbilled receivables
Line of Credit Facility [Line Items]
Maximum availability	$ 1,000,000								$ 1,000,000
Interest rate (percent)	4.00%				4.00%				4.00%	4.00%
Accounts receivables
Line of Credit Facility [Line Items]
Maximum availability	$ 3,000,000								$ 3,000,000
Interest rate (percent)	4.00%								4.00%
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Amount of unused availability under the line	$ 1,350,000								$ 1,350,000