Stock Benefit Plans and Equity Transactions (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Total Stock Based Compensation

Total stock-based compensation for the three and six months ended June 30, 2018 and 2017 is as follows (in thousands):

	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2018		2017			2018		2017
Cost of revenues	$	11	$	11		$	33	$	14
Research and development		129		(20	)		13		291
Sales and marketing		193		151			304		224
General and administrative		815		269			1,417		690
Total	$	1,148	$	411		$	1,767	$	1,219

Summary of Common Stock Reserved for Future Issuance

As of June 30, 2018, the Company had reserved shares of its common stock for future issuance as follows (in thousands):

	June 30, 2018
Stock options outstanding		3,313
Unvested restricted stock award		2,139
Employee stock purchase plan		360
Series A convertible preferred stock		2,022
Convertible Notes		988
Warrants outstanding		20,932
Merger shares issuable		174
Merger contingently issuable		1,330
Authorized for future grant under the Plans		3,773
Total		35,031

Summary of Outstanding Warrants

A summary of all outstanding warrants is as follows:

	Number of Warrants		Strike Price
2017 Common Stock Warrants		3,757,000	$	2.00
2017 Banker Warrants		167,418	$	2.50
2018 Common Stock Warrants		13,471,851	$	3.50
Merger Warrants		2,200,000	$	3.50
Executive		1,327,434	$	5.00
Other		7,812	$	19.20
Total		20,931,515