Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 154,816	$ 150,753
Restricted cash	30,046	21,940
Marine operating supplies	8,037	8,275
Inventories	2,034	2,278
Prepaid expenses and other current assets	32,114	27,094
Total current assets	227,047	210,340
Property and equipment, net	539,177	542,418
Goodwill	42,017	42,017
Intangibles, net	12,830	13,235
Deferred tax asset	7,758	7,609
Right-to-use lease assets	4,085	4,402
Other long-term assets	7,721	7,470
Total assets	840,635	827,491
Current Liabilities:
Unearned passenger revenues	242,161	212,598
Accounts payable and accrued expenses	48,344	49,252
Lease liabilities - current	1,563	1,553
Long-term debt - current	24,072	26,061
Total current liabilities	316,140	289,464
Long-term debt, less current portion	545,099	518,658
Lease liabilities	2,842	3,178
Other long-term liabilities	300	247
Total liabilities	864,381	811,547
Commitments and contingencies
Redeemable noncontrolling interests	14,458	10,626
Temporary Equity, Carrying Amount, Including Portion Attributable to Noncontrolling Interests, Ending Balance	99,659	94,527
STOCKHOLDERS’ (DEFICIT) EQUITY
Preferred stock, $0.0001 par value, 1,000,000 shares authorized; 80,000 Series A shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	0	0
Common stock, $0.0001 par value, 200,000,000 shares authorized; 50,933,471 and 50,800,786 issued, 50,888,231 and 50,755,546 outstanding as of March 31, 2022 and December 31, 2021, respectively	5	5
Additional paid-in capital	60,307	58,485
Accumulated deficit	(183,717)	(136,439)
Accumulated other comprehensive loss	0	(634)
Total stockholders' deficit	(123,405)	(78,583)
Total liabilities, mezzanine equity and stockholders' deficit	840,635	827,491
Series A Redeemable Convertible Preferred Stock [Member]
Current Liabilities:
Series A redeemable convertible preferred stock, 165,000 shares authorized; 80,000 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	$ 85,201	$ 83,901