Long-Term Debt (Schedule of Long-term Debt and Weighted Average Interest) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total principal		$ 72,468	$ 60,019
Deferred financing costs		(411)	(496)
Total long-term debt		72,057	59,523
Less current portion		(17,841)	(17,482)
Long-term debt, less current portion and deferred financing costs		54,216	42,041
Capital Leases [Member]
Debt Instrument [Line Items]
Total principal	[1]		$ 188
Weighted-average interest rate	[1]		7.06%
Credit Agreement - Bank of Montreal [Member]
Debt Instrument [Line Items]
Total principal		$ 52,598	$ 40,515
Weighted-average interest rate		4.82%	4.43%
Credit Agreements - CPL [Member]
Debt Instrument [Line Items]
Total principal		$ 2,465	$ 1,949
Weighted-average interest rate		3.00%	1.77%
Credit Facilities - CPL [Member]
Debt Instrument [Line Items]
Total principal		$ 349	$ 647
Weighted-average interest rate		5.34%	3.57%
Credit Agreement - CCB [Member]
Debt Instrument [Line Items]
Total principal		$ 2,159	$ 2,429
Weighted-average interest rate		2.49%	2.34%
Financing Obligation - CDR Land Lease [Member]
Debt Instrument [Line Items]
Total principal		$ 14,897	$ 14,291
Weighted-average interest rate		15.46%	13.79%
Total Principal [Member]
Debt Instrument [Line Items]
Weighted-average interest rate		6.92%	6.74%

[1] See Note 2 and Note 11 for information related to the treatment of the Company's lease agreements after the adoption of ASU 2016-02 and related amendments.