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Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Current assets:      
Cash and cash equivalents $ 79,083 $ 34,869 $ 22,722
Short-term investments 0 0 19,999
Accounts receivable 26,267 11,956 7,296
Inventories 15,042 1,242 1,294
Prepaid expenses and other current assets 1,865 1,640 1,711
Total current assets 122,257 49,707 53,022
Property and equipment, net 2,205 342 344
Other assets 143 45 45
Total assets 124,605 50,094 53,411
Current liabilities:      
Accounts payable 3,857 3,501 4,059
Accrued expenses 24,405 12,165 9,671
Deferred revenue 6,000 6,520 6,585
Total current liabilities $ 34,262 $ 22,186 $ 20,315
Commitments and contingencies
Stockholders' equity:      
Preferred stock, 1,500,000 shares authorized and no shares issued or outstanding as of December 31, 2015 and 2014; no shares authorized, issued or outstanding as of September 30, 2014 $ 0 $ 0 $ 0
Common stock, $0.001 par value; 50,000,000 shares authorized; 15,636,387, 14,036,680, and 14,032,167 issued and outstanding as of December 31, 2015, 2014, and September 30, 2014, respectively 15 14 14
Additional paid in capital 197,440 137,577 137,259
Accumulated deficit (107,112) (109,683) (104,177)
Total stockholders' equity 90,343 27,908 33,096
Total liabilities and stockholders' equity $ 124,605 $ 50,094 $ 53,411