Accounts and Long Term Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 12,470		$ 15,114
Long-term receivable	$ 5,258		$ 5,328
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity term of accounts and long term receivables	1 year		1 year
Financing receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 1,800		$ 2,100
Long term receivable - financing component	$ 5,000		5,000
Long term receivables interest rate	6.90%
Amount of allowance for credit losses or impairments with a contractual maturity of over one year	$ 0
Accounts and long-term receivable past due	0		0
Activity in allowance for credit losses for accounts and long-term receivables	$ 0
Sales with a payment term of more than a year		$ 0
Contract Receivable, Fiscal Year Maturity [Abstract]
2020 (remaining 9 months)			2,137
2021			2,258
2022			1,880
2023			1,423
Total payments			7,698
Less: unearned income			860
Total, net of unearned income			$ 6,838
Financing receivables | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity term of accounts and long term receivables	1 year
Financing receivables | Other Income
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts And Long Term Receivable, Interest Income	$ 100	$ 0