Debt - Narrative (Details)			12 Months Ended
	Dec. 18, 2019 USD ($)	Apr. 15, 2019 USD ($) business_day	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) trading_day	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) business_day	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Induced conversion of convertible debt expense			$ 2,000,000
Issuance cost, equity component			1,100,000	$ 1,100,000	$ 1,100,000	$ 1,100,000
Description of event of default, default on payment of interest period | business_day		30
Description of event of default, aggregate principal amount of final judgments		$ 10,000,000
Description of event of default, final judgment payment period | business_day		60
Percentage of principal amount due if event of default occurs (at least)		25.00%
Income tax benefit, equity transaction			4,100,000
Line of credit			0	0	0	0	$ 7,819,000
Convertible Senior Notes Due 2024
Debt Instrument [Line Items]
Implied estimated effective rate		10.24%
Convertible Debt
Debt Instrument [Line Items]
Debt issued		$ 80,000,000.0	80,000,000	80,000,000	80,000,000	80,000,000
Liability, debt			61,045,000	61,045,000	61,045,000	61,045,000
Equity component of notes			17,624,000	17,624,000	17,624,000	17,624,000
Issuance cost, equity component			1,094,000	$ 1,094,000	$ 1,094,000	$ 1,094,000
Convertible Debt | Convertible Senior Notes Due 2024
Debt Instrument [Line Items]
Stated interest rate		4.50%
Conversion ratio		0.0350217
Convertible debt threshold, trading days | trading_day				20
Convertible debt threshold, consecutive trading days | business_day						30
Convertible debt, threshold percentage					130.00%
Convertible debt, measurement period				5		5
Convertible debt, measurement period percentage					98.00%
Liability, debt		$ 62,400,000
Equity component of notes		17,600,000
Issuance costs			4,900,000	$ 4,900,000	$ 4,900,000	$ 4,900,000
Issuance cost, equity component			1,100,000	1,100,000	1,100,000	1,100,000
Issuance costs, debt			3,800,000	3,800,000	3,800,000	3,800,000
Secured Debt | Collateralized Mortgage Backed Loan
Debt Instrument [Line Items]
Liability, debt			$ 0	$ 0	$ 0	$ 0	$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Credit agreement revolving loans		$ 25,000,000.0
Restaurant Magic | Subordinate promissory note
Debt Instrument [Line Items]
Stated interest rate	4.50%
Acquisition by delivery of subordinate promissory note	$ 2,000,000
Repayments of interest and principal amount	60,391
Future minimum principal payments 2020	600,000
Future minimum principal payments 2021	700,000
Future minimum principal payments 2021	$ 700,000