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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Jan. 01, 2019
Dreyfus Government Cash Management money market, included in cash equivalents		$ 80,000,000
Assets held for sale	$ 248,000
Asset impairment expense	150,000
Lease liability	415,094	352,810	$ 532,000
Right of use assets	399,477	341,997	$ 512,000
Weighted Average [Member]
Discount rate			8.00%
Trademarks [Member]
Impairment loss	90,000
Long-Term Equity Holding [Member]
Impairment loss	13,000
General And Administrative Expenses [Member]
Impairment loss	$ 103,000
Conventional Salmon Biomass [Member]
Net realizable value		0
AquAdvantage Salmon Biomass [Member]
Net realizable value		$ 1,200,000

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Gross amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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