Lease Commitments - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Nov. 30, 2014 USD ($) Lease	Dec. 31, 2015 USD ($) Lease Renewals	Dec. 31, 2014 USD ($)
Operating Leased Assets [Line Items]
Rent Expense		$ 588,000	$ 658,000
Cost of equipment under capital lease		316,000	272,000
Accumulated depreciation		$ 29,000	$ 29,000
Number of capital leases | Lease	1	3
Capital lease term	3 years
Payments to acquire capital lease	$ 184,000	$ 132,000
Capital leases, principal amount		238,000
Capital leases, interest		$ 21,000
Minimum [Member]
Operating Leased Assets [Line Items]
Capital lease term		3 years
Maximum [Member]
Operating Leased Assets [Line Items]
Capital lease term		5 years
Romeoville Illinois [Member]
Operating Leased Assets [Line Items]
Operating lease number of renewals | Renewals		1
Operating lease extension period		5 years
Monthly rent on lease amounts		$ 25,000
Burr Ridge Facility [Member]
Operating Leased Assets [Line Items]
Operating lease number of renewals | Renewals		1
Monthly rent on lease amounts		$ 14,000
Offsite Warehouse [Member]
Operating Leased Assets [Line Items]
Monthly rent on lease amounts		$ 5,000