XML 44 R27.htm IDEA: XBRL DOCUMENT v3.7.0.1

Stock Based Compensation (Tables)

12 Months Ended

Feb. 28, 2017

Notes to Financial Statements

Weighted-average Black-Scholes assumptions

		Fiscal Year Ended
		February 28, 2017		February 29, 2016
Expected life		4 years		8 years
Risk free interest rate		1.16%		.91% -1.03%
Expected volatility		28.02%		18.73% - 23.72%
Expected dividend yield		0%		0%

X

- References

No definition available.

+ Details

Name:	SOTK_NotesToFinancialStatementsAbstract
Namespace Prefix:	SOTK_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration