Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company engages Mark Kroll, a member of the Board of Directors, to provide consulting services. The expenses related to these services were $0.2 million for each of the years ended December 31, 2015, 2014 and 2013. At December 31, 2015 and 2014, the Company had accrued liabilities of approximately $31,000 and $8,000, respectively, related to these services. The Company subscribes to a mobile collaboration software suite co-founded and managed by Bret Taylor, a member of the Board of Directors. The Company licenses the software for approximately $80,000 per year. As of December 31, 2015 and 2014 the Company had prepaid subscription costs of approximately $36,000 and $20,000, respectively. In connection with the acquisition of Tactical Safety Responses Limited (Note 15), the Company assumed two long-term non-cancellable operating leases for business premises with the former owners who are now employees of the Company. The leases have an average remaining contractual term 11.3 years and require aggregate annual rental payments of approximately $45,000.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.