Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Summary of Significant Accounting Policies

Schedule of balances of contract receivables and liabilities

Contract Balances
	Net Receivables		Contract Liabilities, Current		Contract Liabilities, Long-Term
Opening, January 1, 2018	$	11,065		31		68
Closing, September 30, 2018		13,990		23		49
Increase (decrease)		2,925		(8)		(19)
Opening, January 1, 2019	$	15,321		18		42
Closing, September 30, 2019		15,451		14		22
Increase (decrease)		130		(4)		(20)