Long-Term Debt (Schedule of Long-term Debt and Weighted Average Interest) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total principal	$ 56,021,000	$ 36,781,000
Deferred financing costs	(412,000)	(261,000)
Total long-term debt	55,609,000	36,520,000
Less: current portion	(5,583,000)	(4,123,000)
Long-term portion	$ 50,026,000	$ 32,397,000
Weighted-average interest rate	7.61%	8.21%
Credit Agreement - Bank of Montreal [Member]
Debt Instrument [Line Items]
Total principal	$ 40,495,000	$ 20,419,000
Weighted-average interest rate	4.04%	5.07%
Credit Agreements - CPL [Member]
Debt Instrument [Line Items]
Total principal	$ 215,000	$ 1,647,000
Weighted-average interest rate	3.55%	3.02%
Financing Obligation - CDR Land Lease [Member]
Debt Instrument [Line Items]
Total principal	$ 14,520,000	$ 14,087,000
Weighted-average interest rate	13.54%	12.94%
Capital Lease - CDR [Member]
Debt Instrument [Line Items]
Total principal	$ 791,000	$ 628,000
Weighted-average interest rate	7.11%	5.78%