Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 account Segment	Dec. 31, 2013 Segment	Dec. 31, 2012	Jan. 02, 2014 Segment
Research and Development Expense	$ 9,500,000	$ 8,700,000	$ 8,900,000
Number of reportable operating segments		2		1
Investment in Canadian company accounted under cost method accounting, ownership percentage	10.00%
Impairment charge of intangible assets	0	0	3,382,000
Number of Significant Allowance Accounts	2
Allowances for doubtful accounts	700,000	1,300,000
Allowances for service credits	600,000	900,000
Valuation allowances based on deferred income tax asset	"more likely than not" (greater than a 50% probability)
Total shipping costs	1,200,000	900,000	1,200,000
Advertising expenses	2,300,000	1,100,000	800,000
Cash equivalents instruments initial or remaining maturities	Three months or less
Maximum [Member]
Amortization of intangible assets	15 years
Software Revenue [Domain]
Number of revenue components	2
Other Restructuring [Member]
Advertising expenses	$ 700,000