Common Stock	12 Months Ended
Apr. 30, 2017
Equity [Abstract]
Common Stock	Common Stock On February 29, 2012, the Company completed its initial public offering in which the Company sold 10,906,941 shares of its common stock, of which 10,422,645 shares were offered by the Company and 484,296 shares were offered by selling stockholders, at a price of $12 per share. The gross proceeds raised by the Company from the sale of our common stock in the offering was approximately $125.1 million, resulting in net proceeds from the sale of our common stock of approximately $112.8 million, after deducting underwriting discounts and commissions of approximately $8.8 million and other offering expenses of approximately $3.5 million. On July 23, 2012, the Company completed a follow-on offering in which 9,775,000 shares of its common stock were sold, of which 3,625,000 shares were offered by the Company and 6,150,000 shares were offered by selling stockholders, at a price of $15.40 per share. The gross proceeds raised by the Company from the sale of its common stock in the offering was approximately $55.8 million, resulting in net proceeds to the Company from the sale of its common stock of approximately $51.9 million, after deducting underwriting discounts and commissions of approximately $2.7 million and other offering expenses of approximately $1.2 million.

Common Stock

12 Months Ended

Apr. 30, 2017

On February 29, 2012, the Company completed its initial public offering in which the Company sold 10,906,941 shares of its common stock, of which 10,422,645 shares were offered by the Company and 484,296 shares were offered by selling stockholders, at a price of $12 per share. The gross proceeds raised by the Company from the sale of our common stock in the offering was approximately $125.1 million, resulting in net proceeds from the sale of our common stock of approximately $112.8 million, after deducting underwriting discounts and commissions of approximately $8.8 million and other offering expenses of approximately $3.5 million.

On July 23, 2012, the Company completed a follow-on offering in which 9,775,000 shares of its common stock were sold, of which 3,625,000 shares were offered by the Company and 6,150,000 shares were offered by selling stockholders, at a price of $15.40 per share. The gross proceeds raised by the Company from the sale of its common stock in the offering was approximately $55.8 million, resulting in net proceeds to the Company from the sale of its common stock of approximately $51.9 million, after deducting underwriting discounts and commissions of approximately $2.7 million and other offering expenses of approximately $1.2 million.