Risks and uncertainties	12 Months Ended
Dec. 31, 2019
Risks and Uncertainties [Abstract]
Risks and uncertainties	Risks and uncertainties The Company is subject to risks and uncertainties common in the biotechnology and aquaculture industries. Such risks and uncertainties include, but are not limited to: (i) results from current and planned product development studies and trials; (ii) decisions made by the FDA or similar regulatory bodies in other countries with respect to approval and commercial sale of any of the Company’s proposed products; (iii) the commercial acceptance of any products approved for sale and the Company’s ability to manufacture, distribute, and sell for a profit any products approved for sale; (iv) the Company’s ability to obtain the necessary patents and proprietary rights to effectively protect its technologies; and (v) the outcome of any collaborations or alliances entered into by the Company. Concentration of credit risk Financial instruments that potentially subject the Company to credit risk consist principally of cash and cash equivalents and certificates of deposit. This risk is mitigated by the Company’s policy of investing in financial instruments with short-term maturities issued by highly rated financial institutions. The Company’s cash balances may at times exceed insurance limitations. The Company holds cash balances in bank accounts located in Canada to fund its local operations. These amounts are subject to foreign currency exchange risk, which is minimized by the Company’s policy to limit the balances held in these accounts. Balances in Canadian bank accounts totaled $186 thousand at December 31, 2019. Financial instruments The carrying amounts reported in the consolidated balance sheets for other receivables and accounts payable approximate fair value based on the short-term maturity of these instruments. The carrying value of term debt approximates its fair value since it provides for market terms and interest rates. Included in other assets is a long-term investment that consists of 216,281 shares of common stock of A/F Protein, Inc. (AFP), equating to less than 1% ownership. During 2019, the cost basis for these shares was reduced from $22 thousand to $9 thousand, which the Company believes to be the best estimate of market value. AFP and the Company have certain shareholders in common.

Risks and uncertainties

The Company is subject to risks and uncertainties common in the biotechnology and aquaculture industries. Such risks and uncertainties include, but are not limited to: (i) results from current and planned product development studies and trials; (ii) decisions made by the FDA or similar regulatory bodies in other countries with respect to approval and commercial sale of any of the Company’s proposed products; (iii) the commercial acceptance of any products approved for sale and the Company’s ability to manufacture, distribute, and sell for a profit any products approved for sale; (iv) the Company’s ability to obtain the necessary patents and proprietary rights to effectively protect its technologies; and (v) the outcome of any collaborations or alliances entered into by the Company.

Concentration of credit risk

Financial instruments that potentially subject the Company to credit risk consist principally of cash and cash equivalents and certificates of deposit. This risk is mitigated by the Company’s policy of investing in financial instruments with short-term maturities issued by highly rated financial institutions. The Company’s cash balances may at times exceed insurance limitations. The Company holds cash balances in bank accounts located in Canada to fund its local operations. These amounts are subject to foreign currency exchange risk, which is minimized by the Company’s policy to limit the balances held in these accounts. Balances in Canadian bank accounts totaled $186 thousand at December 31, 2019.

Financial instruments

The carrying amounts reported in the consolidated balance sheets for other receivables and accounts payable approximate fair value based on the short-term maturity of these instruments. The carrying value of term debt approximates its fair value since it provides for market terms and interest rates.

Included in other assets is a long-term investment that consists of 216,281 shares of common stock of A/F Protein, Inc. (AFP), equating to less than 1% ownership. During 2019, the cost basis for these shares was reduced from $22 thousand to $9 thousand, which the Company believes to be the best estimate of market value. AFP and the Company have certain shareholders in common.