Acquisitions and Divestitures - Acquisitions Additional Information (Details)		6 Months Ended
	Oct. 14, 2015 USD ($) payment shares	Jun. 30, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Jun. 30, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Cash paid to acquired entity			$ 300,000	$ 100,000
Goodwill			$ 3,800,000		$ 3,800,000	$ 28,100,000
Scenario, Forecast
Business Acquisition [Line Items]
Cash paid to acquired entity		$ 300,000
Common Stock
Business Acquisition [Line Items]
Common stock paid to acquired entity, shares | shares			57,482	31,354
Common Stock | Scenario, Forecast
Business Acquisition [Line Items]
Common stock paid to acquired entity, shares | shares		57,482
Connected Data, Inc.
Business Acquisition [Line Items]
Percentage of stock owned in acquired entity	100.00%
Cash paid to acquired entity	$ 700,000
Common stock paid to acquired entity, shares | shares	151,115
Common stock paid to acquired entity, value	$ 2,600,000
Repayment of debt	2,600,000
Future contingent consideration	5,000,000
Contingent consideration, estimated fair value	800,000
Total purchase price	6,700,000
Goodwill	$ 3,800,000
Number of potential contingent consideration payments | payment	3
Connected Data, Inc. | Common Stock
Business Acquisition [Line Items]
Discount rate	15.00%