Business Acquisitions Business Acquisition details (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 01, 2016	Jan. 15, 2015	Oct. 01, 2016
Business Acquisition [Line Items]
Business Combination Contingent Consideration Arrangements Shares Recovered			63,114
Business Combination Contingent Consideration Arrangement Shares Recovered price per share			$ 6.30
Visicon [Member]
Business Acquisition [Line Items]
Acquisition Costs, Period Cost	$ 500
Payments to Acquire Businesses, Gross	$ 2,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	637,082
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 4,500
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued in Escrow	33,143
Topwin [Member]
Business Acquisition [Line Items]
Business Combination, Bargain Purchase, Total Gain		$ 3,618
Payments to Acquire Businesses, Gross		$ 7,600
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		748,944
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned		$ 2,900