| Intangibles, net (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | 
|---|---|---|
| Indefinite-lived intangible assets | ||
| Kona Grill trade name | $ 17,400 | $ 17,400 | 
| Finite-lived intangible assets | 101 | 75 | 
| Less: accumulated amortization | (2,187) | (2,185) | 
| Total intangibles, net | $ 15,314 | $ 15,290 | 
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- References No definition available. 
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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