Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investment in Canadian company accounted under cost method accounting, ownership percentage	10.00%
Impairment charge of intangible assets	$ 0	$ 3,382,000	$ 0
Allowances for doubtful accounts	1,300,000	1,200,000
Valuation allowances based on deferred income tax asset	"more likely than not" (greater than a 50% probability)
Cash equivalents instruments initial or remaining maturities	Three months or less
Wireless Operations [Member]
Allowances for service credits	300,000	400,000
Other allowances	400,000	400,000
Total shipping costs	600,000	800,000	1,000,000
Advertising expenses	65,000	32,000	26,000
Software Operations [Member]
Impairment charge of intangible assets	0	3,400,000	0
Allowances for doubtful accounts	700,000	600,000
Other allowances	200,000	100,000
Number of revenue components	2
Total shipping costs	300,000	400,000	500,000
Advertising expenses	$ 1,000,000	$ 800,000	$ 300,000
Software Operations [Member] | Maximum [Member]
Amortization of intangible assets	15 years
Software Operations [Member] | Minimum [Member]
Amortization of intangible assets	2 years
Software Service, Support and Maintenance Arrangement [Member]
Software maintenance, recognition period	1 year