Maturity period of highly liquid investments.

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- Definition

Percentage of ownership in property plant equipment of the company.

+ References

No definition available.

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- References

No definition available.

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Significant Accounting Policies Additional Information [Line Items]
Convertible Debt, Noncurrent	$ 14,711,580				$ 0				$ 14,711,580	$ 0
Allowance for doubtful accounts receivable	100,000				70,000				100,000	70,000
Revenues	$ 5,691,000	$ 5,285,000	$ 4,627,000	$ 4,023,000	$ 3,322,000	$ 3,003,000	$ 2,917,000	$ 2,712,000	$ 19,626,453	$ 11,954,267
Maturity Period Of Highly Liquid Investments									90 days
Finite-Lived Intangible Asset, Useful Life									7 years
Foreign Currency Transaction Gain (Loss), before Tax									$ (20,400)
Cryogenic Shippers [Member]
Significant Accounting Policies Additional Information [Line Items]
Property Plant Equipment Ownership Percentage	34.00%								34.00%
Data loggers [Member]
Significant Accounting Policies Additional Information [Line Items]
Property Plant Equipment Ownership Percentage					47.00%					47.00%
Foreign Customers [Member]
Significant Accounting Policies Additional Information [Line Items]
Revenues									$ 1,700,000	$ 1,300,000
Accounts Receivable [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									10.00%	10.00%
Accounts Receivable [Member] \| Customer One [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									29.00%
Accounts Receivable [Member] \| Customer Two [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									23.40%
Sales Revenue, Net [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									10.00%	10.00%
Sales Revenue, Net [Member] \| Customer One [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									18.20%
Sales Revenue, Net [Member] \| Foreign Customers [Member]
Significant Accounting Policies Additional Information [Line Items]
Concentration risk, percentage									9.00%	11.10%