Stock Incentive Plan and Employee Stock Purchase Plan (Tables)

12 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of share-based compensation charges included in the Company's consolidated statements of operations and comprehensive income (loss)

The following table summarizes the share‑based compensation charges included in the Company’s consolidated statements of operations and comprehensive income (loss) (in thousands):

	Years ended June 30,
	2023		2022		2021
Cost of revenue	$	1,439	$	1,584	$	1,296
Research and development		1,396		1,371		1,348
Selling and marketing		1,586		2,213		1,457
General and administrative		5,632		5,432		5,231
Total	$	10,053	$	10,600	$	9,332

Summary of share-based compensation charges included in the Company's Equity Awards

The following table summarizes the share‑based compensation charges for the Company’s equity awards (in thousands):

	Years ended June 30,
	2023		2022		2021
Stock options	$	2,011	$	2,565	$	2,431
Restricted stock units		7,004		6,160		5,425
Performance stock units		54		571		—
Employee stock purchase plan		984		1,304		1,374
Market stock units		—		—		102
Total	$	10,053	$	10,600	$	9,332

Schedule of assumptions used for determining fair value of stock options

The fair value of each option is estimated at the date of grant using the Black‑Scholes option pricing formula with the following assumptions:

	Years Ended June 30,
	2023			2022			2021
Risk–free interest rate		—	%	2.71% - 3.21%			0.59% - 1.27%
Dividend yield		—	%		—	%		—	%
Expected term		—		7.30 - 8.94			6.72 - 6.88
Expected volatility		—	%	54.1% - 57.3%			54.7% - 55.6%

Schedule of option activity under the Company's Incentive Plan

A summary of option activity under the Company’s incentive plan is presented below (in thousands except per share and term amounts):

	Options Outstanding			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (In Years)		Aggregate Intrinsic Value (1)
Balance at June 30, 2022		7,053		$	3.73		7.05	$	—
Options granted		—			—
Options exercised		—			—
Options forfeited/expired		(1,573	)	$	4.90
Balance at June 30, 2023		5,480		$	3.40		6.53	$	3,580
Vested or expected to vest at June 30, 2023		5,480		$	3.40		6.53	$	3,580
Exercisable at June 30, 2023		4,411		$	3.51		6.15	$	2,364

1.The aggregate intrinsic value represents the total pre-tax intrinsic value, which is computed based on the difference between the exercise price and the closing price of Accuray common stock of $3.87 and $1.96 on June 30, 2023 and June 30, 2022, respectively, The amount represents what would have been received by the option holders had all option holders exercised their options and sold the shares received upon exercise as of that date.

Summary of information about outstanding and exercisable options

The following table summarizes information about outstanding and exercisable options at June 30, 2023 (in thousands, except years and exercise price):

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Outstanding		Weighted Average Exercise Price
$1.96 – 2.08		756		8.94	$	2.05		201	$	2.05
$2.60 – 2.60		1,533		6.34	$	2.60		1,405	$	2.60
$2.96 – 3.71		311		6.59	$	3.05		265	$	3.06
$4.10 – 4.10		2,048		5.42	$	4.10		2,048	$	4.10
$4.46 – 5.00		832		7.41	$	4.50		492	$	4.52
Total outstanding		5,480						4,411

Summary of activity of RSUs and PSUs

The following table summarizes the activity of RSUs and PSUs (in thousands, except fair value per share):

Unvested Restricted Stock	Restricted Stock Units			Performance Stock Units			Total Number of Shares Underlying Stock Awards			Weighted Average Grant Date Fair Value Per Share
Unvested at June 30, 2022		4,561			1,217			5,778		$	3.74
Granted		3,349			1,171			4,520		$	2.12
Vested		(1,850	)		—			(1,850	)	$	3.79
Cancelled/forfeited		(726	)		(339	)		(1,065	)	$	3.47
Unvested at June 30, 2023		5,334			2,049			7,383		$	2.77

Schedule of weighted average assumptions used for determining fair value of ESPP shares

The Company estimates the fair value of ESPP shares at the date of grant using the Black‑Scholes option pricing model. The weighted average assumptions were as follows:

	Years Ended June 30,
	2023	2022	2021
Risk–free interest rate	4.65% - 5.44%	0.10% - 2.16%	0.04% - 0.10%
Dividend yield	—%	—%	—%
Expected term	0.5 - 1.0	0.5 - 1.0	0.5 - 1.0
Expected volatility	38.98% - 61.09%	35.49% - 54.33%	36.10% - 65.58%