Equity Method Investment - Stock Purchase Agreement with Kleo (Details) $ / shares in Units, $ in Thousands			1 Months Ended					9 Months Ended		11 Months Ended
	Aug. 31, 2016 shares	Aug. 29, 2016 director tranche $ / shares shares	Nov. 30, 2018 USD ($) shares	Jan. 31, 2018 USD ($) shares	Oct. 31, 2017 USD ($) shares	Jun. 30, 2017 USD ($) shares	Mar. 31, 2017 USD ($) shares	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jan. 31, 2018 shares
Equity Method Investment
Cash payment for purchase of equity method investment | $								$ 0	$ 1,375
Kleo
Equity Method Investment
Shares of Kleo common stock purchased (shares)			1,420,818		2,049,543
Cash payment for purchase of equity method investment | $			$ 5,000		$ 2,253
Shares of Kleo common stock purchased from co-founder (shares)							500,000
Cash payment for purchase of Kleo officer and stockholder shares | $							$ 250
Issuance of common shares for purchase of Kleo office and stockholder shares (shares)							32,500
Ownership percentage (percent)			41.90%
Kleo | Kleo Stock Purchase Agreement
Equity Method Investment
Shares to be purchased per stock purchase agreement (shares)		3,000,000
Additional shares to be purchased per stock purchase agreement (shares)		5,500,000
Price per share (in dollars per share) | $ / shares		$ 1.00
Shares of Kleo common stock purchased (shares)	3,000,000			1,375,000	1,375,000	1,375,000	1,375,000			5,500,000
Cash payment for purchase of equity method investment | $				$ 1,375	$ 1,375	$ 1,375	$ 1,375
Number of equal tranches of shares to be purchased | tranche		4
Shares to be purchased in equal tranches (shares)		1,375,000
Period of time shares begin to be purchased in equal tranches after initial closing		6 months
Period of time shares are purchased after initial purchase		3 months
Number to designate to Kleo's board of directors | director		2