Consolidated Statements of Cash Flows (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income for the year	$ 12,685,826us-gaap_ProfitLoss	$ 21,217,193us-gaap_ProfitLoss	$ 28,958,487us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	33,811,607us-gaap_DepreciationNonproduction	30,761,673us-gaap_DepreciationNonproduction	28,776,688us-gaap_DepreciationNonproduction
Amortization of deferred finance charges	656,341us-gaap_AmortizationOfDeferredCharges	425,933us-gaap_AmortizationOfDeferredCharges	412,138us-gaap_AmortizationOfDeferredCharges
Amortization of deferred gain on sale and leaseback of vessels	(4,954)
Unrealized exchange differences	251,662	3,745	98,294
Share based compensation	357,967us-gaap_ShareBasedCompensation	292,628us-gaap_ShareBasedCompensation	31,268us-gaap_ShareBasedCompensation
Change in fair value of derivatives	(1,019,853)us-gaap_UnrealizedGainLossOnDerivatives	(2,784,123)us-gaap_UnrealizedGainLossOnDerivatives	(3,506,897)us-gaap_UnrealizedGainLossOnDerivatives
Impairment loss	6,168,747	0	0
Gain on sale of vessels			(1,372,409)
(Increase)/decrease in
Trade and other receivables	1,869,466	(2,055,817)	(1,708,048)
Claims receivable	(317,570)	(1,905,152)	(502,534)
Inventories	(497,573)us-gaap_IncreaseDecreaseInInventories	691,314us-gaap_IncreaseDecreaseInInventories	(736,299)us-gaap_IncreaseDecreaseInInventories
Advances and prepayments	(670,559)	(280,218)	193,397
Increase/(decrease) in
Balance with related parties	(999,147)	(1,452,332)	(586,091)
Trade accounts payable	1,104,798	1,442,443	(526,281)
Accrued liabilities	1,022,650	25,207	(1,653,992)
Deferred income	818,327	2,744,881	563,255
Net cash provided by operating activities	55,237,735	49,127,375	48,440,976
Cash flows from investing activities
Insurance proceeds	384,164	1,801,120	986,102
Vessels’ acquisitions and advances for vessels under construction	(129,891,982)	(124,406,294)	(62,634,833)
Proceeds from sale of vessels, net	27,929,931		18,136,907
Net proceeds related to cancellation of vessels’ acquisitions	10,044,799
(Increase)/decrease in restricted cash account	425,225	2,818,753	(386,292)
Net cash used in investing activities	(91,107,863)	(119,786,421)	(43,898,116)
Cash flows from financing activities
Stock repurchase	(4,789,158)us-gaap_PaymentsForRepurchaseOfEquity
Net proceeds from common stock issuance	112,302,678	109,119,029
Deferred finance charges paid	(1,130,675)us-gaap_PaymentsOfFinancingCosts	(1,747,031)us-gaap_PaymentsOfFinancingCosts
Customer deposits received			5,000
Customer deposits paid		(280,000)gass_PaymentsForCustomerDeposits
Loan repayments	(75,268,462)us-gaap_RepaymentsOfLongTermDebt	(37,696,190)us-gaap_RepaymentsOfLongTermDebt	(48,965,869)us-gaap_RepaymentsOfLongTermDebt
Proceeds from long-term debt	47,903,693	45,212,500	43,250,000
Net cash (used in)/provided by financing activities	79,018,076	114,608,308	(5,710,869)
Effect of exchange rate changes on cash	(251,662)	(3,745)	(98,294)
Net (decrease)/increase in cash and cash equivalents	42,896,286	43,945,517	(1,266,303)
Cash and cash equivalents at beginning of year	86,218,517	42,273,000	43,539,303
Cash and cash equivalents at end of year	129,114,803	86,218,517	42,273,000
Supplemental Cash Flow Information:
Cash paid during the year for interest, net of amounts capitalized	6,770,830us-gaap_InterestPaidNet	7,374,110us-gaap_InterestPaidNet	8,757,734us-gaap_InterestPaidNet
Non cash financing activity – Stock repurchase	$ 517,933

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Cash received from customers for deposits on goods or services during the period; excludes deposits with other institutions and time deposits, which pertain to financial services entities.

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The cash inflow from the amounts received by the insured under the terms of an insurance contract settlement. This element pertains only to insurance proceeds related to investments, for example fixed assets. It excludes insurance settlements classified as operating cash flows.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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