Long-Term Debt (Schedule of Long-term Debt and Weighted Average Interest) (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total principal		$ 68,249	$ 60,019
Deferred financing costs		(477)	(496)
Total long-term debt		67,772	59,523
Less current portion		(17,992)	(17,482)
Long-term portion		49,780	42,041
Credit Agreement - Bank of Montreal [Member]
Debt Instrument [Line Items]
Total principal		$ 48,036	$ 40,515
Weighted-average interest rate		4.42%	4.43%
Credit Agreements - CPL [Member]
Debt Instrument [Line Items]
Total principal		$ 2,216	$ 1,949
Weighted-average interest rate		3.21%	1.77%
Credit Facilities - CPL [Member]
Debt Instrument [Line Items]
Total principal		$ 1,061	$ 647
Weighted-average interest rate		5.17%	3.57%
Credit Agreement - CCB [Member]
Debt Instrument [Line Items]
Total principal		$ 2,346	$ 2,429
Weighted-average interest rate		2.52%	2.34%
Financing Obligation - CDR Land Lease [Member]
Debt Instrument [Line Items]
Total principal		$ 14,590	$ 14,291
Weighted-average interest rate		14.62%	13.79%
Capital Lease - CDR [Member]
Debt Instrument [Line Items]
Total principal	[1]		$ 188
Weighted-average interest rate	[1]		7.06%
Total Principal [Member]
Debt Instrument [Line Items]
Weighted-average interest rate		6.58%	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.