CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 16,970,558	$ 13,073,137
Short-term investments	28,691,026	40,624,349
Deferred financing costs, short-term	346,458us-gaap_DeferredFinanceCostsCurrentNet	375,808us-gaap_DeferredFinanceCostsCurrentNet
Prepaid expenses and other current assets	2,096,308	1,784,069
Total current assets	48,104,350us-gaap_AssetsCurrent	55,857,363us-gaap_AssetsCurrent
Property and equipment, net	518,815us-gaap_PropertyPlantAndEquipmentNet	528,476us-gaap_PropertyPlantAndEquipmentNet
Intangible assets	41,575,516	41,575,516
Goodwill	16,902,466us-gaap_Goodwill	16,902,466us-gaap_Goodwill
Deferred financing costs, long-term	1,125,989	1,299,674
Other assets	2,127,551us-gaap_OtherAssetsNoncurrent	2,127,551us-gaap_OtherAssetsNoncurrent
Total assets	110,354,687us-gaap_Assets	118,291,046us-gaap_Assets
Current liabilities:
Accounts payable	1,456,173us-gaap_AccountsPayableCurrent	1,138,470us-gaap_AccountsPayableCurrent
Accrued expenses	5,229,686us-gaap_AccruedLiabilitiesCurrent	3,727,784us-gaap_AccruedLiabilitiesCurrent
Derivative liabilities	223,404us-gaap_DerivativeLiabilitiesCurrent	256,027us-gaap_DerivativeLiabilitiesCurrent
Total current liabilities	6,909,263us-gaap_LiabilitiesCurrent	5,122,281us-gaap_LiabilitiesCurrent
Convertible notes payable, net of discount	27,555,296us-gaap_LongTermNotesPayable	28,979,342us-gaap_LongTermNotesPayable
Derivative liabilities	1,977,000us-gaap_DerivativeLiabilitiesNoncurrent	2,400,000us-gaap_DerivativeLiabilitiesNoncurrent
Deferred taxes	16,879,659	16,879,659
Contingent consideration and other liabilities	32,553,821	31,507,588
Total liabilities	85,875,039us-gaap_Liabilities	84,888,870us-gaap_Liabilities
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 25,000,000 shares authorized, none issued and outstanding
Common stock, $0.0001 par value; 100,000,000 shares authorized, 22,199,256 and 22,334,901 shares issued and outstanding at December 31, 2013 and June 30, 2014, respectively	2,333us-gaap_CommonStockValue	2,234us-gaap_CommonStockValue
Additional paid-in capital	163,037,867us-gaap_AdditionalPaidInCapital	159,308,307us-gaap_AdditionalPaidInCapital
Cumulative translation adjustment	(47,515)	(69,031)
Cumulative unrealized gain (loss) on investments	1,162	(8,117)
Accumulated deficit	(138,514,199)	(125,831,217)
Total stockholders' equity	24,479,648us-gaap_StockholdersEquity	33,402,176us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 110,354,687	$ 118,291,046

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682