STOCKHOLDERS' EQUITY

Stock Options

Information with respect to stock option activity during the six months ended March 31, 2019 follows:



	Options		Weighted Average Exercise Price Per Share		Weighted Average Grant Date Fair Value Per Share		Weighted Average Remaining Contractual term (years)	Aggregate Intrinsic Value
Outstanding at September 30, 2018	612,000		$	6.23	$	1.59	3.27	$	—
Forfeited	(1,800	)	$	5.00	$	2.30		$	—
Outstanding at March 31, 2019	610,200		$	6.19	$	1.59	2.76	$	—
Vested and exercisable at March 31, 2019	610,200		$	6.19	$	1.59	2.76	$	—

All compensation expense associated with the grants of stock options was recognized in prior years.

Warrants

The following table summarizes information about warrant activity during the six months ended March 31, 2019:



	Warrants		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term
Outstanding at September 30, 2018	12,436,427		$	3.25	3.30
Exercised	(38	)	$	3.25
Forfeited or expired	(7,037,482	)	$	3.25
Outstanding and exercisable at March 31, 2019	5,398,907		$	3.25	2.81

7,037,482 warrants held by FBIO Acquisition were forfeited due to the FBIO sale. See Note 18.

Restricted Stock Units

A summary of the Company's non-vested restricted stock units for the six months ended March 31, 2019 is as follows:



	Shares		Weighted Average Grant Date Fair Value
Non-vested restricted stock units at September 30, 2018	2,207,242		$	7,302,000
Granted	1,713,252		5,133,000
Vested	(334,622	)	(1,422,000		)
Forfeited	(115,356	)	(374,000		)
Non-vested restricted stock units at March 31, 2019	3,470,516		$	10,639,000

In November 2018, the Company granted 1,447,292 restricted stock units ("RSUs") to certain employees of the Company. RSUs vest based on service and certain performance and market conditions. The fair value of the RSU awards issued in November 2018 was $4,289,000.

In February 2019, the Company granted 265,960 RSUs to certain directors and employees of the Company. RSUs vest based on service and certain performance and market conditions. The fair value of the RSU awards issued in February 2019 was $843,000.

One RSU gives the right to one share of the Company’s common stock. RSUs that vest based on service and performance are measured based on the fair values of the underlying stock on the date of grant. The Company used a Lattice model to determine the fair value of the RSUs with a market condition. Compensation with respect to RSU awards is expensed on a straight-line basis over the vesting period.

For the three and six months ended March 31, 2019, the Company recognized compensation expense of $1,480,000 and $2,802,000, respectively, related to RSUs. For the three and six months ended March 31, 2018, the Company recognized compensation expense of $418,000 and $676,000, respectively, related to RSUs. At March 31, 2019, unrecognized compensation with respect to RSUs amounted to $6,440,000, assuming all performance-based compensation will vest.