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Revenue Recognition (Contract Balances) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Trade accounts receivable, net
Balance, January 1, 2019	$ 20,817
Balance, December 31, 2019	15,444
Increase (decrease) in accounts receivable	(5,373)
Contract liability (current)
Balance, January 1, 2019	754
Balance, December 31, 2019	944
Increase (decrease) in contract liability (current)	190
Contract liability (long-term)
Balance, January 1, 2019	2,008
Balance, December 31, 2019	2,153
Increase (decrease) in contract liability (long-term)	$ 145

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- Definition

Change in Contract with Customer, Asset [Roll Forward]

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 606
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-Section 50
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