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Related Party Transactions - Narrative (Details) - USD ($)					1 Months Ended			12 Months Ended
	Feb. 11, 2020	Sep. 05, 2019	Oct. 30, 2017	Sep. 28, 2015	Apr. 30, 2019	Feb. 28, 2019	Apr. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Feb. 13, 2019
Related Party Transactions
Employee options granted to purchase shares of common stock (in shares)								100,000	250,000
Payments to acquire equity method investments								$ 673,000	$ 3,083,000
Accounts receivable								$ 13,006,000	12,646,000
Azzurro Capital, Inc.
Related Party Transactions
Percent of outstanding shares								47.80%
Stock Options Granted | Chief Executive Officer
Related Party Transactions
Employee options granted to purchase shares of common stock (in shares)			400,000	400,000
February 2019 Plan
Related Party Transactions
Stock repurchased program authorized number of shares (in shares)										100,000
Aggregate purchase price										$ 1,600,000.0
Stock repurchase program discount on purchase price										5.00%
Stock repurchased during period (in shares)						100,000
Aggregate purchase price of shares repurchased						$ 1,600,000
November 2019 Plan
Related Party Transactions
Stock repurchase program discount on purchase price										4.40%
Stock repurchased during period (in shares)						200,000
Aggregate purchase price of shares repurchased						$ 2,000,000
WeekenGO
Related Party Transactions
Payments to acquire equity method investments					$ 673,000		$ 3,000,000
Ownership percentage					26.60%		25.00%
WeekenGO | Equity Method Investee
Related Party Transactions
Future expected revenue									2,100,000
Purchases from related party								$ 1,200,000	319,000
Accounts receivable								$ 230,000	$ 58,000
Including Holger Proxy
Related Party Transactions
Ownership percentage of voting power								48.20%
Subsequent Event | WeekenGO
Related Party Transactions
Payments to acquire equity method investments	$ 1,700,000
Ownership percentage	33.70%
Stock Options | September 2019 Executive Options | Stock Options Granted | Chief Executive Officer
Related Party Transactions
Employee options granted to purchase shares of common stock (in shares)		400,000

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