Share-Based Payments (Details 1) - $ / shares	9 Months Ended
Nov. 30, 2019	Nov. 30, 2018	Feb. 28, 2019	Feb. 28, 2018
Exercise price	$ 6.55	$ 8.29	$ 7.53	$ 7.99
Number of stock options, outstanding	1,657,081	2,205,290	1,962,400	2,374,581
Number of stock options, exercisable	1,007,498	1,065,414
Weighted average remaining life, outstanding	7 years 1 month 28 days	7 years 2 months 19 days
Weighted average remaining life, exercisable	7 years 1 month 10 days	7 years 7 months 13 days
Stock Option 1
Exercise price	$ .80	$ .80
Number of stock options, outstanding	577,081	582,081
Weighted average remaining life, outstanding	6 years	7 years
Stock Option 2
Exercise price	$ 3.00	$ 3.00
Number of stock options, outstanding	0	0
Weighted average remaining life, outstanding	0 years	0 years
Stock Option 3
Exercise price	$ 5.25	$ 5.25
Number of stock options, outstanding	380,000	380,000
Weighted average remaining life, outstanding	7 years 8 months 27 days	8 years 8 months 27 days
Stock Option 4
Exercise price	$ 8.75	$ 8.75
Number of stock options, outstanding	0	0
Weighted average remaining life, outstanding	0 years	0 years
Stock Option 5
Exercise price	$ 11.52	$ 11.52
Number of stock options, outstanding	0	13,209
Weighted average remaining life, outstanding	0 years	9 years 7 months 10 days
Stock Option 6
Exercise price	$ 12.00	$ 12.00
Number of stock options, outstanding	700,000	700,000
Weighted average remaining life, outstanding	7 years 9 months 15 days	8 years 9 months 15 days
Stock Option 7
Exercise price	$ 13.49	$ 13.49
Number of stock options, outstanding	0	250,000
Weighted average remaining life, outstanding	0 years	8 years 10 months 17 days
Stock Option 8
Exercise price	$ 13.89	$ 13.89
Number of stock options, outstanding	0	280,000
Weighted average remaining life, outstanding	0 years	25 days

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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