5. Accrued business consolidation and restructuring expenses (Detail) (USD $)	3 Months Ended	6 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011	Sep. 30, 2012
Restructuring and Related Cost, Expected Cost				$ 140,000
Restructuring and Related Cost, Cost Incurred to Date	63,000	117,000
Restructuring and Related Cost, Incurred Cost			$ 184,000