Revenue Recognition (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Capitalized contract cost, amortization		$ 300,000	$ 400,000
Capitalized contract cost, impairment loss	$ 1,300,000	0	1,300,000
Costs to fulfill	1,152,000	1,238,000	1,152,000
Contract liabilities	17,614,000	9,568,000	17,614,000	$ 18,364,000	$ 21,497,000
Cash received	$ 11,387,000	36,662,000	11,387,000
Revenue recognized		$ 44,708,000	$ 11,850,000