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Note 4 - Inventories (Details) - Inventory (USD $) | Dec. 31, 2014 | Dec. 31, 2013
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Inventory [Abstract] |  |
Bunkers | $ 1,426,838 gass_InventoriesBunkers | $ 930,630 gass_InventoriesBunkers
Lubricants | 1,531,828 gass_InventoryLubricants | 1,530,463 gass_InventoryLubricants
Total | $ 2,958,666 us-gaap_InventoryNet | $ 2,461,093 us-gaap_InventoryNet

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- Definition Carrying amount (lower of cost or market) as of the balance sheet date of inventories of bunkers. + References No definition available. + Details
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Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Carrying amount (lower of cost or market) as of the balance sheet date of inventories of lubricants. + References No definition available. + Details
Name: | gass_InventoryLubricants
Namespace Prefix: | gass_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=51655945&loc=d3e3927-108312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 + Details
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