STOCK OPTIONS (Details 1) - Employee Stock Option [Member]	12 Months Ended
Mar. 31, 2018 USD ($)
February 17, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	3 years 10 months 20 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 136,613
July 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	3 years 3 months
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 1,259,487
June 20, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	3 years 2 months 19 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 118,957
April 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	3 years 4 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 230,930
November 24, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	4 years 7 months 24 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 694,384
December 14, 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	4 years 8 months 16 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 1,260,437
April 21, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	6 years 1 month 10 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 2,582,890
April 26, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	5 years 25 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 213,750
August 8, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	5 years 4 months 10 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 652,068
February 6, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	5 years 10 months 10 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 245,200
February 13, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	5 years 10 months 17 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 148,750
August 3, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	6 years 4 months 6 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 387,209
September 1, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	9 years 5 months 5 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 1,832,304
January 24, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life in years	6 years 9 months 25 days
Risk free rate	1.59%
Dividend rate	0.00%
Forfeiture rate	0.00%
Expected volatility	114.00%
Grant date fair value	$ 491,036

Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Forfeiture Rate.

No definition available.

Name:	bnkl_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate
Namespace Prefix:	bnkl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ References

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration