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10. Warrants (June 30, 2017 Note) | 3 Months Ended
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Jun. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Warrants | During the three months ended June 30, 2017, we did not issue any warrants A summary of warrant activity during the three months ended June 30, 2017 is presented below:
|  | Amount |  |  | Range of Exercise Price |  | Weighted Average Exercise Price |
Warrants outstanding at March 31, 2017 |  |  | 2,604,096 |  |  | $2.10 - $15.00 |  | $ | 3.64 |
Exercised |  |  | – |  |  | n/a |  |  | n/a |
Issued |  |  | – |  |  | n/a |  |  | n/a |
Cancelled/Expired |  |  | (128,357 | ) |  | $5.00 –$9.00 |  | $ | 5.80 |
Warrants outstanding at June 30, 2017 |  |  | 2,475,739 |  |  | $2.10 - $15.00 |  | $ | 3.47 |
Warrants exercisable at June 30, 2017 |  |  | 2,475,739 |  |  | $2.10 - $15.00 |  | $ | 3.47 |
The following outlines the significant weighted average assumptions used to estimate the fair value information presented, with respect to warrants utilizing the Binomial Lattice option pricing models at, and during the three months ended June 30, 2016:
Risk free interest rate | 0.79% – 1.38%
Average expected life | 3 months – 2.33 years
Expected volatility | 68% – 111%
Expected dividends | None
The expected volatility was based on the historic volatility. The expected life of options granted was based on the "simplified method" as described in the SEC's guidance due to changes in the vesting terms and contractual life of current option grants compared to our historical grants. Based on the above assumptions, we valued the warrants that were exchanged for common stock (see Note 6) during the three months ended June 30, 2017 at $119,789.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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