Other Long-Term Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Cash surrender value of corporate-owned life insurance policies (Note 1)	$ 3,240	$ 2,180
Prepaid commissions	5,302	3,543
Restricted cash	3,317	0
Prepaid expenses, deposits and other	2,058	246
Other long-term assets	13,917	$ 5,969
Axon Artificial Intelligence
Restricted Cash and Cash Equivalents Items [Line Items]
Prepaid expenses, deposits and other	1,800
Customer A
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	2,700
Customer B
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 600